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/module.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, ®s); 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", ®s); 462 463 rio_regs_win = ioremap(regs.start, resource_size(®s)); 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); 789