arch/powerpc/sysdev/fsl_rio.c

   1 /*
   2  * Freescale MPC85xx/MPC86xx RapidIO support
   3  *
   4  * Copyright 2009 Sysgo AG
   5  * Thomas Moll <thomas.moll@sysgo.com>
   6  * - fixed maintenance access routines, check for aligned access
   7  *
   8  * Copyright 2009 Integrated Device Technology, Inc.
   9  * Alex Bounine <alexandre.bounine@idt.com>
  10  * - Added Port-Write message handling
  11  * - Added Machine Check exception handling
  12  *
  13  * Copyright (C) 2007, 2008, 2010, 2011 Freescale Semiconductor, Inc.
  14  * Zhang Wei <wei.zhang@freescale.com>
  15  *
  16  * Copyright 2005 MontaVista Software, Inc.
  17  * Matt Porter <mporter@kernel.crashing.org>
  18  *
  19  * This program is free software; you can redistribute  it and/or modify it
  20  * under  the terms of  the GNU General  Public License as published by the
  21  * Free Software Foundation;  either version 2 of the  License, or (at your
  22  * option) any later version.
  23  */
  24
  25 #include <linux/init.h>
  26 #include <linux/extable.h>
  27 #include <linux/types.h>
  28 #include <linux/dma-mapping.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/device.h>
  31 #include <linux/of_address.h>
  32 #include <linux/of_irq.h>
  33 #include <linux/of_platform.h>
  34 #include <linux/delay.h>
  35 #include <linux/slab.h>
  36
  37 #include <linux/io.h>
  38 #include <linux/uaccess.h>
  39 #include <asm/machdep.h>
  40
  41 #include "fsl_rio.h"
  42
  43 #undef DEBUG_PW /* Port-Write debugging */
  44
  45 #define RIO_PORT1_EDCSR         0x0640
  46 #define RIO_PORT2_EDCSR         0x0680
  47 #define RIO_PORT1_IECSR         0x10130
  48 #define RIO_PORT2_IECSR         0x101B0
  49
  50 #define RIO_GCCSR               0x13c
  51 #define RIO_ESCSR               0x158
  52 #define ESCSR_CLEAR             0x07120204
  53 #define RIO_PORT2_ESCSR         0x178
  54 #define RIO_CCSR                0x15c
  55 #define RIO_LTLEDCSR_IER        0x80000000
  56 #define RIO_LTLEDCSR_PRT        0x01000000
  57 #define IECSR_CLEAR             0x80000000
  58 #define RIO_ISR_AACR            0x10120
  59 #define RIO_ISR_AACR_AA         0x1     /* Accept All ID */
  60
  61 #define RIWTAR_TRAD_VAL_SHIFT   12
  62 #define RIWTAR_TRAD_MASK        0x00FFFFFF
  63 #define RIWBAR_BADD_VAL_SHIFT   12
  64 #define RIWBAR_BADD_MASK        0x003FFFFF
  65 #define RIWAR_ENABLE            0x80000000
  66 #define RIWAR_TGINT_LOCAL       0x00F00000
  67 #define RIWAR_RDTYP_NO_SNOOP    0x00040000
  68 #define RIWAR_RDTYP_SNOOP       0x00050000
  69 #define RIWAR_WRTYP_NO_SNOOP    0x00004000
  70 #define RIWAR_WRTYP_SNOOP       0x00005000
  71 #define RIWAR_WRTYP_ALLOC       0x00006000
  72 #define RIWAR_SIZE_MASK         0x0000003F
  73
  74 #define __fsl_read_rio_config(x, addr, err, op)         \
  75         __asm__ __volatile__(                           \
  76                 "1:     "op" %1,0(%2)\n"                \
  77                 "       eieio\n"                        \
  78                 "2:\n"                                  \
  79                 ".section .fixup,\"ax\"\n"              \
  80                 "3:     li %1,-1\n"                     \
  81                 "       li %0,%3\n"                     \
  82                 "       b 2b\n"                         \
  83                 ".section __ex_table,\"a\"\n"           \
  84                         PPC_LONG_ALIGN "\n"             \
  85                         PPC_LONG "1b,3b\n"              \
  86                 ".text"                                 \
  87                 : "=r" (err), "=r" (x)                  \
  88                 : "b" (addr), "i" (-EFAULT), "0" (err))
  89
  90 void __iomem *rio_regs_win;
  91 void __iomem *rmu_regs_win;
  92 resource_size_t rio_law_start;
  93
  94 struct fsl_rio_dbell *dbell;
  95 struct fsl_rio_pw *pw;
  96
  97 #ifdef CONFIG_E500
  98 int fsl_rio_mcheck_exception(struct pt_regs *regs)
  99 {
 100         const struct exception_table_entry *entry;
 101         unsigned long reason;
 102
 103         if (!rio_regs_win)
 104                 return 0;
 105
 106         reason = in_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR));
 107         if (reason & (RIO_LTLEDCSR_IER | RIO_LTLEDCSR_PRT)) {
 108                 /* Check if we are prepared to handle this fault */
 109                 entry = search_exception_tables(regs->nip);
 110                 if (entry) {
 111                         pr_debug("RIO: %s - MC Exception handled\n",
 112                                  __func__);
 113                         out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR),
 114                                  0);
 115                         regs->msr |= MSR_RI;
 116                         regs->nip = entry->fixup;
 117                         return 1;
 118                 }
 119         }
 120
 121         return 0;
 122 }
 123 EXPORT_SYMBOL_GPL(fsl_rio_mcheck_exception);
 124 #endif
 125
 126 /**
 127  * fsl_local_config_read - Generate a MPC85xx local config space read
 128  * @mport: RapidIO master port info
 129  * @index: ID of RapdiIO interface
 130  * @offset: Offset into configuration space
 131  * @len: Length (in bytes) of the maintenance transaction
 132  * @data: Value to be read into
 133  *
 134  * Generates a MPC85xx local configuration space read. Returns %0 on
 135  * success or %-EINVAL on failure.
 136  */
 137 static int fsl_local_config_read(struct rio_mport *mport,
 138                                 int index, u32 offset, int len, u32 *data)
 139 {
 140         struct rio_priv *priv = mport->priv;
 141         pr_debug("fsl_local_config_read: index %d offset %8.8x\n", index,
 142                  offset);
 143         *data = in_be32(priv->regs_win + offset);
 144
 145         return 0;
 146 }
 147
 148 /**
 149  * fsl_local_config_write - Generate a MPC85xx local config space write
 150  * @mport: RapidIO master port info
 151  * @index: ID of RapdiIO interface
 152  * @offset: Offset into configuration space
 153  * @len: Length (in bytes) of the maintenance transaction
 154  * @data: Value to be written
 155  *
 156  * Generates a MPC85xx local configuration space write. Returns %0 on
 157  * success or %-EINVAL on failure.
 158  */
 159 static int fsl_local_config_write(struct rio_mport *mport,
 160                                 int index, u32 offset, int len, u32 data)
 161 {
 162         struct rio_priv *priv = mport->priv;
 163         pr_debug
 164                 ("fsl_local_config_write: index %d offset %8.8x data %8.8x\n",
 165                 index, offset, data);
 166         out_be32(priv->regs_win + offset, data);
 167
 168         return 0;
 169 }
 170
 171 /**
 172  * fsl_rio_config_read - Generate a MPC85xx read maintenance transaction
 173  * @mport: RapidIO master port info
 174  * @index: ID of RapdiIO interface
 175  * @destid: Destination ID of transaction
 176  * @hopcount: Number of hops to target device
 177  * @offset: Offset into configuration space
 178  * @len: Length (in bytes) of the maintenance transaction
 179  * @val: Location to be read into
 180  *
 181  * Generates a MPC85xx read maintenance transaction. Returns %0 on
 182  * success or %-EINVAL on failure.
 183  */
 184 static int
 185 fsl_rio_config_read(struct rio_mport *mport, int index, u16 destid,
 186                         u8 hopcount, u32 offset, int len, u32 *val)
 187 {
 188         struct rio_priv *priv = mport->priv;
 189         u8 *data;
 190         u32 rval, err = 0;
 191
 192         pr_debug
 193                 ("fsl_rio_config_read:"
 194                 " index %d destid %d hopcount %d offset %8.8x len %d\n",
 195                 index, destid, hopcount, offset, len);
 196
 197         /* 16MB maintenance window possible */
 198         /* allow only aligned access to maintenance registers */
 199         if (offset > (0x1000000 - len) || !IS_ALIGNED(offset, len))
 200                 return -EINVAL;
 201
 202         out_be32(&priv->maint_atmu_regs->rowtar,
 203                  (destid << 22) | (hopcount << 12) | (offset >> 12));
 204         out_be32(&priv->maint_atmu_regs->rowtear, (destid >> 10));
 205
 206         data = (u8 *) priv->maint_win + (offset & (RIO_MAINT_WIN_SIZE - 1));
 207         switch (len) {
 208         case 1:
 209                 __fsl_read_rio_config(rval, data, err, "lbz");
 210                 break;
 211         case 2:
 212                 __fsl_read_rio_config(rval, data, err, "lhz");
 213                 break;
 214         case 4:
 215                 __fsl_read_rio_config(rval, data, err, "lwz");
 216                 break;
 217         default:
 218                 return -EINVAL;
 219         }
 220
 221         if (err) {
 222                 pr_debug("RIO: cfg_read error %d for %x:%x:%x\n",
 223                          err, destid, hopcount, offset);
 224         }
 225
 226         *val = rval;
 227
 228         return err;
 229 }
 230
 231 /**
 232  * fsl_rio_config_write - Generate a MPC85xx write maintenance transaction
 233  * @mport: RapidIO master port info
 234  * @index: ID of RapdiIO interface
 235  * @destid: Destination ID of transaction
 236  * @hopcount: Number of hops to target device
 237  * @offset: Offset into configuration space
 238  * @len: Length (in bytes) of the maintenance transaction
 239  * @val: Value to be written
 240  *
 241  * Generates an MPC85xx write maintenance transaction. Returns %0 on
 242  * success or %-EINVAL on failure.
 243  */
 244 static int
 245 fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid,
 246                         u8 hopcount, u32 offset, int len, u32 val)
 247 {
 248         struct rio_priv *priv = mport->priv;
 249         u8 *data;
 250         pr_debug
 251                 ("fsl_rio_config_write:"
 252                 " index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
 253                 index, destid, hopcount, offset, len, val);
 254
 255         /* 16MB maintenance windows possible */
 256         /* allow only aligned access to maintenance registers */
 257         if (offset > (0x1000000 - len) || !IS_ALIGNED(offset, len))
 258                 return -EINVAL;
 259
 260         out_be32(&priv->maint_atmu_regs->rowtar,
 261                  (destid << 22) | (hopcount << 12) | (offset >> 12));
 262         out_be32(&priv->maint_atmu_regs->rowtear, (destid >> 10));
 263
 264         data = (u8 *) priv->maint_win + (offset & (RIO_MAINT_WIN_SIZE - 1));
 265         switch (len) {
 266         case 1:
 267                 out_8((u8 *) data, val);
 268                 break;
 269         case 2:
 270                 out_be16((u16 *) data, val);
 271                 break;
 272         case 4:
 273                 out_be32((u32 *) data, val);
 274                 break;
 275         default:
 276                 return -EINVAL;
 277         }
 278
 279         return 0;
 280 }
 281
 282 static void fsl_rio_inbound_mem_init(struct rio_priv *priv)
 283 {
 284         int i;
 285
 286         /* close inbound windows */
 287         for (i = 0; i < RIO_INB_ATMU_COUNT; i++)
 288                 out_be32(&priv->inb_atmu_regs[i].riwar, 0);
 289 }
 290
 291 int fsl_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
 292         u64 rstart, u64 size, u32 flags)
 293 {
 294         struct rio_priv *priv = mport->priv;
 295         u32 base_size;
 296         unsigned int base_size_log;
 297         u64 win_start, win_end;
 298         u32 riwar;
 299         int i;
 300
 301         if ((size & (size - 1)) != 0 || size > 0x400000000ULL)
 302                 return -EINVAL;
 303
 304         base_size_log = ilog2(size);
 305         base_size = 1 << base_size_log;
 306
 307         /* check if addresses are aligned with the window size */
 308         if (lstart & (base_size - 1))
 309                 return -EINVAL;
 310         if (rstart & (base_size - 1))
 311                 return -EINVAL;
 312
 313         /* check for conflicting ranges */
 314         for (i = 0; i < RIO_INB_ATMU_COUNT; i++) {
 315                 riwar = in_be32(&priv->inb_atmu_regs[i].riwar);
 316                 if ((riwar & RIWAR_ENABLE) == 0)
 317                         continue;
 318                 win_start = ((u64)(in_be32(&priv->inb_atmu_regs[i].riwbar) & RIWBAR_BADD_MASK))
 319                         << RIWBAR_BADD_VAL_SHIFT;
 320                 win_end = win_start + ((1 << ((riwar & RIWAR_SIZE_MASK) + 1)) - 1);
 321                 if (rstart < win_end && (rstart + size) > win_start)
 322                         return -EINVAL;
 323         }
 324
 325         /* find unused atmu */
 326         for (i = 0; i < RIO_INB_ATMU_COUNT; i++) {
 327                 riwar = in_be32(&priv->inb_atmu_regs[i].riwar);
 328                 if ((riwar & RIWAR_ENABLE) == 0)
 329                         break;
 330         }
 331         if (i >= RIO_INB_ATMU_COUNT)
 332                 return -ENOMEM;
 333
 334         out_be32(&priv->inb_atmu_regs[i].riwtar, lstart >> RIWTAR_TRAD_VAL_SHIFT);
 335         out_be32(&priv->inb_atmu_regs[i].riwbar, rstart >> RIWBAR_BADD_VAL_SHIFT);
 336         out_be32(&priv->inb_atmu_regs[i].riwar, RIWAR_ENABLE | RIWAR_TGINT_LOCAL |
 337                 RIWAR_RDTYP_SNOOP | RIWAR_WRTYP_SNOOP | (base_size_log - 1));
 338
 339         return 0;
 340 }
 341
 342 void fsl_unmap_inb_mem(struct rio_mport *mport, dma_addr_t lstart)
 343 {
 344         u32 win_start_shift, base_start_shift;
 345         struct rio_priv *priv = mport->priv;
 346         u32 riwar, riwtar;
 347         int i;
 348
 349         /* skip default window */
 350         base_start_shift = lstart >> RIWTAR_TRAD_VAL_SHIFT;
 351         for (i = 0; i < RIO_INB_ATMU_COUNT; i++) {
 352                 riwar = in_be32(&priv->inb_atmu_regs[i].riwar);
 353                 if ((riwar & RIWAR_ENABLE) == 0)
 354                         continue;
 355
 356                 riwtar = in_be32(&priv->inb_atmu_regs[i].riwtar);
 357                 win_start_shift = riwtar & RIWTAR_TRAD_MASK;
 358                 if (win_start_shift == base_start_shift) {
 359                         out_be32(&priv->inb_atmu_regs[i].riwar, riwar & ~RIWAR_ENABLE);
 360                         return;
 361                 }
 362         }
 363 }
 364
 365 void fsl_rio_port_error_handler(int offset)
 366 {
 367         /*XXX: Error recovery is not implemented, we just clear errors */
 368         out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR), 0);
 369
 370         if (offset == 0) {
 371                 out_be32((u32 *)(rio_regs_win + RIO_PORT1_EDCSR), 0);
 372                 out_be32((u32 *)(rio_regs_win + RIO_PORT1_IECSR), IECSR_CLEAR);
 373                 out_be32((u32 *)(rio_regs_win + RIO_ESCSR), ESCSR_CLEAR);
 374         } else {
 375                 out_be32((u32 *)(rio_regs_win + RIO_PORT2_EDCSR), 0);
 376                 out_be32((u32 *)(rio_regs_win + RIO_PORT2_IECSR), IECSR_CLEAR);
 377                 out_be32((u32 *)(rio_regs_win + RIO_PORT2_ESCSR), ESCSR_CLEAR);
 378         }
 379 }
 380 static inline void fsl_rio_info(struct device *dev, u32 ccsr)
 381 {
 382         const char *str;
 383         if (ccsr & 1) {
 384                 /* Serial phy */
 385                 switch (ccsr >> 30) {
 386                 case 0:
 387                         str = "1";
 388                         break;
 389                 case 1:
 390                         str = "4";
 391                         break;
 392                 default:
 393                         str = "Unknown";
 394                         break;
 395                 }
 396                 dev_info(dev, "Hardware port width: %s\n", str);
 397
 398                 switch ((ccsr >> 27) & 7) {
 399                 case 0:
 400                         str = "Single-lane 0";
 401                         break;
 402                 case 1:
 403                         str = "Single-lane 2";
 404                         break;
 405                 case 2:
 406                         str = "Four-lane";
 407                         break;
 408                 default:
 409                         str = "Unknown";
 410                         break;
 411                 }
 412                 dev_info(dev, "Training connection status: %s\n", str);
 413         } else {
 414                 /* Parallel phy */
 415                 if (!(ccsr & 0x80000000))
 416                         dev_info(dev, "Output port operating in 8-bit mode\n");
 417                 if (!(ccsr & 0x08000000))
 418                         dev_info(dev, "Input port operating in 8-bit mode\n");
 419         }
 420 }
 421
 422 /**
 423  * fsl_rio_setup - Setup Freescale PowerPC RapidIO interface
 424  * @dev: platform_device pointer
 425  *
 426  * Initializes MPC85xx RapidIO hardware interface, configures
 427  * master port with system-specific info, and registers the
 428  * master port with the RapidIO subsystem.
 429  */
 430 int fsl_rio_setup(struct platform_device *dev)
 431 {
 432         struct rio_ops *ops;
 433         struct rio_mport *port;
 434         struct rio_priv *priv;
 435         int rc = 0;
 436         const u32 *dt_range, *cell, *port_index;
 437         u32 active_ports = 0;
 438         struct resource regs, rmu_regs;
 439         struct device_node *np, *rmu_node;
 440         int rlen;
 441         u32 ccsr;
 442         u64 range_start, range_size;
 443         int paw, aw, sw;
 444         u32 i;
 445         static int tmp;
 446         struct device_node *rmu_np[MAX_MSG_UNIT_NUM] = {NULL};
 447
 448         if (!dev->dev.of_node) {
 449                 dev_err(&dev->dev, "Device OF-Node is NULL");
 450                 return -ENODEV;
 451         }
 452
 453         rc = of_address_to_resource(dev->dev.of_node, 0, &regs);
 454         if (rc) {
 455                 dev_err(&dev->dev, "Can't get %s property 'reg'\n",
 456                                 dev->dev.of_node->full_name);
 457                 return -EFAULT;
 458         }
 459         dev_info(&dev->dev, "Of-device full name %s\n",
 460                         dev->dev.of_node->full_name);
 461         dev_info(&dev->dev, "Regs: %pR\n", &regs);
 462
 463         rio_regs_win = ioremap(regs.start, resource_size(&regs));
 464         if (!rio_regs_win) {
 465                 dev_err(&dev->dev, "Unable to map rio register window\n");
 466                 rc = -ENOMEM;
 467                 goto err_rio_regs;
 468         }
 469
 470         ops = kzalloc(sizeof(struct rio_ops), GFP_KERNEL);
 471         if (!ops) {
 472                 rc = -ENOMEM;
 473                 goto err_ops;
 474         }
 475         ops->lcread = fsl_local_config_read;
 476         ops->lcwrite = fsl_local_config_write;
 477         ops->cread = fsl_rio_config_read;
 478         ops->cwrite = fsl_rio_config_write;
 479         ops->dsend = fsl_rio_doorbell_send;
 480         ops->pwenable = fsl_rio_pw_enable;
 481         ops->open_outb_mbox = fsl_open_outb_mbox;
 482         ops->open_inb_mbox = fsl_open_inb_mbox;
 483         ops->close_outb_mbox = fsl_close_outb_mbox;
 484         ops->close_inb_mbox = fsl_close_inb_mbox;
 485         ops->add_outb_message = fsl_add_outb_message;
 486         ops->add_inb_buffer = fsl_add_inb_buffer;
 487         ops->get_inb_message = fsl_get_inb_message;
 488         ops->map_inb = fsl_map_inb_mem;
 489         ops->unmap_inb = fsl_unmap_inb_mem;
 490
 491         rmu_node = of_parse_phandle(dev->dev.of_node, "fsl,srio-rmu-handle", 0);
 492         if (!rmu_node) {
 493                 dev_err(&dev->dev, "No valid fsl,srio-rmu-handle property\n");
 494                 rc = -ENOENT;
 495                 goto err_rmu;
 496         }
 497         rc = of_address_to_resource(rmu_node, 0, &rmu_regs);
 498         if (rc) {
 499                 dev_err(&dev->dev, "Can't get %s property 'reg'\n",
 500                                 rmu_node->full_name);
 501                 goto err_rmu;
 502         }
 503         rmu_regs_win = ioremap(rmu_regs.start, resource_size(&rmu_regs));
 504         if (!rmu_regs_win) {
 505                 dev_err(&dev->dev, "Unable to map rmu register window\n");
 506                 rc = -ENOMEM;
 507                 goto err_rmu;
 508         }
 509         for_each_compatible_node(np, NULL, "fsl,srio-msg-unit") {
 510                 rmu_np[tmp] = np;
 511                 tmp++;
 512         }
 513
 514         /*set up doobell node*/
 515         np = of_find_compatible_node(NULL, NULL, "fsl,srio-dbell-unit");
 516         if (!np) {
 517                 dev_err(&dev->dev, "No fsl,srio-dbell-unit node\n");
 518                 rc = -ENODEV;
 519                 goto err_dbell;
 520         }
 521         dbell = kzalloc(sizeof(struct fsl_rio_dbell), GFP_KERNEL);
 522         if (!(dbell)) {
 523                 dev_err(&dev->dev, "Can't alloc memory for 'fsl_rio_dbell'\n");
 524                 rc = -ENOMEM;
 525                 goto err_dbell;
 526         }
 527         dbell->dev = &dev->dev;
 528         dbell->bellirq = irq_of_parse_and_map(np, 1);
 529         dev_info(&dev->dev, "bellirq: %d\n", dbell->bellirq);
 530
 531         aw = of_n_addr_cells(np);
 532         dt_range = of_get_property(np, "reg", &rlen);
 533         if (!dt_range) {
 534                 pr_err("%s: unable to find 'reg' property\n",
 535                         np->full_name);
 536                 rc = -ENOMEM;
 537                 goto err_pw;
 538         }
 539         range_start = of_read_number(dt_range, aw);
 540         dbell->dbell_regs = (struct rio_dbell_regs *)(rmu_regs_win +
 541                                 (u32)range_start);
 542
 543         /*set up port write node*/
 544         np = of_find_compatible_node(NULL, NULL, "fsl,srio-port-write-unit");
 545         if (!np) {
 546                 dev_err(&dev->dev, "No fsl,srio-port-write-unit node\n");
 547                 rc = -ENODEV;
 548                 goto err_pw;
 549         }
 550         pw = kzalloc(sizeof(struct fsl_rio_pw), GFP_KERNEL);
 551         if (!(pw)) {
 552                 dev_err(&dev->dev, "Can't alloc memory for 'fsl_rio_pw'\n");
 553                 rc = -ENOMEM;
 554                 goto err_pw;
 555         }
 556         pw->dev = &dev->dev;
 557         pw->pwirq = irq_of_parse_and_map(np, 0);
 558         dev_info(&dev->dev, "pwirq: %d\n", pw->pwirq);
 559         aw = of_n_addr_cells(np);
 560         dt_range = of_get_property(np, "reg", &rlen);
 561         if (!dt_range) {
 562                 pr_err("%s: unable to find 'reg' property\n",
 563                         np->full_name);
 564                 rc = -ENOMEM;
 565                 goto err;
 566         }
 567         range_start = of_read_number(dt_range, aw);
 568         pw->pw_regs = (struct rio_pw_regs *)(rmu_regs_win + (u32)range_start);
 569
 570         /*set up ports node*/
 571         for_each_child_of_node(dev->dev.of_node, np) {
 572                 port_index = of_get_property(np, "cell-index", NULL);
 573                 if (!port_index) {
 574                         dev_err(&dev->dev, "Can't get %s property 'cell-index'\n",
 575                                         np->full_name);
 576                         continue;
 577                 }
 578
 579                 dt_range = of_get_property(np, "ranges", &rlen);
 580                 if (!dt_range) {
 581                         dev_err(&dev->dev, "Can't get %s property 'ranges'\n",
 582                                         np->full_name);
 583                         continue;
 584                 }
 585
 586                 /* Get node address wide */
 587                 cell = of_get_property(np, "#address-cells", NULL);
 588                 if (cell)
 589                         aw = *cell;
 590                 else
 591                         aw = of_n_addr_cells(np);
 592                 /* Get node size wide */
 593                 cell = of_get_property(np, "#size-cells", NULL);
 594                 if (cell)
 595                         sw = *cell;
 596                 else
 597                         sw = of_n_size_cells(np);
 598                 /* Get parent address wide wide */
 599                 paw = of_n_addr_cells(np);
 600                 range_start = of_read_number(dt_range + aw, paw);
 601                 range_size = of_read_number(dt_range + aw + paw, sw);
 602
 603                 dev_info(&dev->dev, "%s: LAW start 0x%016llx, size 0x%016llx.\n",
 604                                 np->full_name, range_start, range_size);
 605
 606                 port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
 607                 if (!port)
 608                         continue;
 609
 610                 rc = rio_mport_initialize(port);
 611                 if (rc) {
 612                         kfree(port);
 613                         continue;
 614                 }
 615
 616                 i = *port_index - 1;
 617                 port->index = (unsigned char)i;
 618
 619                 priv = kzalloc(sizeof(struct rio_priv), GFP_KERNEL);
 620                 if (!priv) {
 621                         dev_err(&dev->dev, "Can't alloc memory for 'priv'\n");
 622                         kfree(port);
 623                         continue;
 624                 }
 625
 626                 INIT_LIST_HEAD(&port->dbells);
 627                 port->iores.start = range_start;
 628                 port->iores.end = port->iores.start + range_size - 1;
 629                 port->iores.flags = IORESOURCE_MEM;
 630                 port->iores.name = "rio_io_win";
 631
 632                 if (request_resource(&iomem_resource, &port->iores) < 0) {
 633                         dev_err(&dev->dev, "RIO: Error requesting master port region"
 634                                 " 0x%016llx-0x%016llx\n",
 635                                 (u64)port->iores.start, (u64)port->iores.end);
 636                                 kfree(priv);
 637                                 kfree(port);
 638                                 continue;
 639                 }
 640                 sprintf(port->name, "RIO mport %d", i);
 641
 642                 priv->dev = &dev->dev;
 643                 port->dev.parent = &dev->dev;
 644                 port->ops = ops;
 645                 port->priv = priv;
 646                 port->phys_efptr = 0x100;
 647                 port->phys_rmap = 1;
 648                 priv->regs_win = rio_regs_win;
 649
 650                 ccsr = in_be32(priv->regs_win + RIO_CCSR + i*0x20);
 651
 652                 /* Checking the port training status */
 653                 if (in_be32((priv->regs_win + RIO_ESCSR + i*0x20)) & 1) {
 654                         dev_err(&dev->dev, "Port %d is not ready. "
 655                         "Try to restart connection...\n", i);
 656                         /* Disable ports */
 657                         out_be32(priv->regs_win
 658                                 + RIO_CCSR + i*0x20, 0);
 659                         /* Set 1x lane */
 660                         setbits32(priv->regs_win
 661                                 + RIO_CCSR + i*0x20, 0x02000000);
 662                         /* Enable ports */
 663                         setbits32(priv->regs_win
 664                                 + RIO_CCSR + i*0x20, 0x00600000);
 665                         msleep(100);
 666                         if (in_be32((priv->regs_win
 667                                         + RIO_ESCSR + i*0x20)) & 1) {
 668                                 dev_err(&dev->dev,
 669                                         "Port %d restart failed.\n", i);
 670                                 release_resource(&port->iores);
 671                                 kfree(priv);
 672                                 kfree(port);
 673                                 continue;
 674                         }
 675                         dev_info(&dev->dev, "Port %d restart success!\n", i);
 676                 }
 677                 fsl_rio_info(&dev->dev, ccsr);
 678
 679                 port->sys_size = (in_be32((priv->regs_win + RIO_PEF_CAR))
 680                                         & RIO_PEF_CTLS) >> 4;
 681                 dev_info(&dev->dev, "RapidIO Common Transport System size: %d\n",
 682                                 port->sys_size ? 65536 : 256);
 683
 684                 if (port->host_deviceid >= 0)
 685                         out_be32(priv->regs_win + RIO_GCCSR, RIO_PORT_GEN_HOST |
 686                                 RIO_PORT_GEN_MASTER | RIO_PORT_GEN_DISCOVERED);
 687                 else
 688                         out_be32(priv->regs_win + RIO_GCCSR,
 689                                 RIO_PORT_GEN_MASTER);
 690
 691                 priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win
 692                         + ((i == 0) ? RIO_ATMU_REGS_PORT1_OFFSET :
 693                         RIO_ATMU_REGS_PORT2_OFFSET));
 694
 695                 priv->maint_atmu_regs = priv->atmu_regs + 1;
 696                 priv->inb_atmu_regs = (struct rio_inb_atmu_regs __iomem *)
 697                         (priv->regs_win +
 698                         ((i == 0) ? RIO_INB_ATMU_REGS_PORT1_OFFSET :
 699                         RIO_INB_ATMU_REGS_PORT2_OFFSET));
 700
 701                 /* Set to receive packets with any dest ID */
 702                 out_be32((priv->regs_win + RIO_ISR_AACR + i*0x80),
 703                          RIO_ISR_AACR_AA);
 704
 705                 /* Configure maintenance transaction window */
 706                 out_be32(&priv->maint_atmu_regs->rowbar,
 707                         port->iores.start >> 12);
 708                 out_be32(&priv->maint_atmu_regs->rowar,
 709                          0x80077000 | (ilog2(RIO_MAINT_WIN_SIZE) - 1));
 710
 711                 priv->maint_win = ioremap(port->iores.start,
 712                                 RIO_MAINT_WIN_SIZE);
 713
 714                 rio_law_start = range_start;
 715
 716                 fsl_rio_setup_rmu(port, rmu_np[i]);
 717                 fsl_rio_inbound_mem_init(priv);
 718
 719                 dbell->mport[i] = port;
 720                 pw->mport[i] = port;
 721
 722                 if (rio_register_mport(port)) {
 723                         release_resource(&port->iores);
 724                         kfree(priv);
 725                         kfree(port);
 726                         continue;
 727                 }
 728                 active_ports++;
 729         }
 730
 731         if (!active_ports) {
 732                 rc = -ENOLINK;
 733                 goto err;
 734         }
 735
 736         fsl_rio_doorbell_init(dbell);
 737         fsl_rio_port_write_init(pw);
 738
 739         return 0;
 740 err:
 741         kfree(pw);
 742         pw = NULL;
 743 err_pw:
 744         kfree(dbell);
 745         dbell = NULL;
 746 err_dbell:
 747         iounmap(rmu_regs_win);
 748         rmu_regs_win = NULL;
 749 err_rmu:
 750         kfree(ops);
 751 err_ops:
 752         iounmap(rio_regs_win);
 753         rio_regs_win = NULL;
 754 err_rio_regs:
 755         return rc;
 756 }
 757
 758 /* The probe function for RapidIO peer-to-peer network.
 759  */
 760 static int fsl_of_rio_rpn_probe(struct platform_device *dev)
 761 {
 762         printk(KERN_INFO "Setting up RapidIO peer-to-peer network %s\n",
 763                         dev->dev.of_node->full_name);
 764
 765         return fsl_rio_setup(dev);
 766 };
 767
 768 static const struct of_device_id fsl_of_rio_rpn_ids[] = {
 769         {
 770                 .compatible = "fsl,srio",
 771         },
 772         {},
 773 };
 774
 775 static struct platform_driver fsl_of_rio_rpn_driver = {
 776         .driver = {
 777                 .name = "fsl-of-rio",
 778                 .of_match_table = fsl_of_rio_rpn_ids,
 779         },
 780         .probe = fsl_of_rio_rpn_probe,
 781 };
 782
 783 static __init int fsl_of_rio_rpn_init(void)
 784 {
 785         return platform_driver_register(&fsl_of_rio_rpn_driver);
 786 }
 787
 788 subsys_initcall(fsl_of_rio_rpn_init);