1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Freescale MPC85xx/MPC86xx RapidIO support 4 * 5 * Copyright 2009 Sysgo AG 6 * Thomas Moll <thomas.moll@sysgo.com> 7 * - fixed maintenance access routines, check for aligned access 8 * 9 * Copyright 2009 Integrated Device Technology, Inc. 10 * Alex Bounine <alexandre.bounine@idt.com> 11 * - Added Port-Write message handling 12 * - Added Machine Check exception handling 13 * 14 * Copyright (C) 2007, 2008, 2010, 2011 Freescale Semiconductor, Inc. 15 * Zhang Wei <wei.zhang@freescale.com> 16 * 17 * Copyright 2005 MontaVista Software, Inc. 18 * Matt Porter <mporter@kernel.crashing.org> 19 */ 20 21 #include <linux/init.h> 22 #include <linux/extable.h> 23 #include <linux/types.h> 24 #include <linux/dma-mapping.h> 25 #include <linux/interrupt.h> 26 #include <linux/device.h> 27 #include <linux/of_address.h> 28 #include <linux/of_irq.h> 29 #include <linux/of_platform.h> 30 #include <linux/delay.h> 31 #include <linux/slab.h> 32 33 #include <linux/io.h> 34 #include <linux/uaccess.h> 35 #include <asm/machdep.h> 36 37 #include "fsl_rio.h" 38 39 #undef DEBUG_PW /* Port-Write debugging */ 40 41 #define RIO_PORT1_EDCSR 0x0640 42 #define RIO_PORT2_EDCSR 0x0680 43 #define RIO_PORT1_IECSR 0x10130 44 #define RIO_PORT2_IECSR 0x101B0 45 46 #define RIO_GCCSR 0x13c 47 #define RIO_ESCSR 0x158 48 #define ESCSR_CLEAR 0x07120204 49 #define RIO_PORT2_ESCSR 0x178 50 #define RIO_CCSR 0x15c 51 #define RIO_LTLEDCSR_IER 0x80000000 52 #define RIO_LTLEDCSR_PRT 0x01000000 53 #define IECSR_CLEAR 0x80000000 54 #define RIO_ISR_AACR 0x10120 55 #define RIO_ISR_AACR_AA 0x1 /* Accept All ID */ 56 57 #define RIWTAR_TRAD_VAL_SHIFT 12 58 #define RIWTAR_TRAD_MASK 0x00FFFFFF 59 #define RIWBAR_BADD_VAL_SHIFT 12 60 #define RIWBAR_BADD_MASK 0x003FFFFF 61 #define RIWAR_ENABLE 0x80000000 62 #define RIWAR_TGINT_LOCAL 0x00F00000 63 #define RIWAR_RDTYP_NO_SNOOP 0x00040000 64 #define RIWAR_RDTYP_SNOOP 0x00050000 65 #define RIWAR_WRTYP_NO_SNOOP 0x00004000 66 #define RIWAR_WRTYP_SNOOP 0x00005000 67 #define RIWAR_WRTYP_ALLOC 0x00006000 68 #define RIWAR_SIZE_MASK 0x0000003F 69 70 static DEFINE_SPINLOCK(fsl_rio_config_lock); 71 72 #define __fsl_read_rio_config(x, addr, err, op) \ 73 __asm__ __volatile__( \ 74 "1: "op" %1,0(%2)\n" \ 75 " eieio\n" \ 76 "2:\n" \ 77 ".section .fixup,\"ax\"\n" \ 78 "3: li %1,-1\n" \ 79 " li %0,%3\n" \ 80 " b 2b\n" \ 81 ".previous\n" \ 82 EX_TABLE(1b, 3b) \ 83 : "=r" (err), "=r" (x) \ 84 : "b" (addr), "i" (-EFAULT), "0" (err)) 85 86 void __iomem *rio_regs_win; 87 void __iomem *rmu_regs_win; 88 resource_size_t rio_law_start; 89 90 struct fsl_rio_dbell *dbell; 91 struct fsl_rio_pw *pw; 92 93 #ifdef CONFIG_E500 94 int fsl_rio_mcheck_exception(struct pt_regs *regs) 95 { 96 const struct exception_table_entry *entry; 97 unsigned long reason; 98 99 if (!rio_regs_win) 100 return 0; 101 102 reason = in_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR)); 103 if (reason & (RIO_LTLEDCSR_IER | RIO_LTLEDCSR_PRT)) { 104 /* Check if we are prepared to handle this fault */ 105 entry = search_exception_tables(regs->nip); 106 if (entry) { 107 pr_debug("RIO: %s - MC Exception handled\n", 108 __func__); 109 out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR), 110 0); 111 regs_set_recoverable(regs); 112 regs_set_return_ip(regs, extable_fixup(entry)); 113 return 1; 114 } 115 } 116 117 return 0; 118 } 119 EXPORT_SYMBOL_GPL(fsl_rio_mcheck_exception); 120 #endif 121 122 /** 123 * fsl_local_config_read - Generate a MPC85xx local config space read 124 * @mport: RapidIO master port info 125 * @index: ID of RapdiIO interface 126 * @offset: Offset into configuration space 127 * @len: Length (in bytes) of the maintenance transaction 128 * @data: Value to be read into 129 * 130 * Generates a MPC85xx local configuration space read. Returns %0 on 131 * success or %-EINVAL on failure. 132 */ 133 static int fsl_local_config_read(struct rio_mport *mport, 134 int index, u32 offset, int len, u32 *data) 135 { 136 struct rio_priv *priv = mport->priv; 137 pr_debug("fsl_local_config_read: index %d offset %8.8x\n", index, 138 offset); 139 *data = in_be32(priv->regs_win + offset); 140 141 return 0; 142 } 143 144 /** 145 * fsl_local_config_write - Generate a MPC85xx local config space write 146 * @mport: RapidIO master port info 147 * @index: ID of RapdiIO interface 148 * @offset: Offset into configuration space 149 * @len: Length (in bytes) of the maintenance transaction 150 * @data: Value to be written 151 * 152 * Generates a MPC85xx local configuration space write. Returns %0 on 153 * success or %-EINVAL on failure. 154 */ 155 static int fsl_local_config_write(struct rio_mport *mport, 156 int index, u32 offset, int len, u32 data) 157 { 158 struct rio_priv *priv = mport->priv; 159 pr_debug 160 ("fsl_local_config_write: index %d offset %8.8x data %8.8x\n", 161 index, offset, data); 162 out_be32(priv->regs_win + offset, data); 163 164 return 0; 165 } 166 167 /** 168 * fsl_rio_config_read - Generate a MPC85xx read maintenance transaction 169 * @mport: RapidIO master port info 170 * @index: ID of RapdiIO interface 171 * @destid: Destination ID of transaction 172 * @hopcount: Number of hops to target device 173 * @offset: Offset into configuration space 174 * @len: Length (in bytes) of the maintenance transaction 175 * @val: Location to be read into 176 * 177 * Generates a MPC85xx read maintenance transaction. Returns %0 on 178 * success or %-EINVAL on failure. 179 */ 180 static int 181 fsl_rio_config_read(struct rio_mport *mport, int index, u16 destid, 182 u8 hopcount, u32 offset, int len, u32 *val) 183 { 184 struct rio_priv *priv = mport->priv; 185 unsigned long flags; 186 u8 *data; 187 u32 rval, err = 0; 188 189 pr_debug 190 ("fsl_rio_config_read:" 191 " index %d destid %d hopcount %d offset %8.8x len %d\n", 192 index, destid, hopcount, offset, len); 193 194 /* 16MB maintenance window possible */ 195 /* allow only aligned access to maintenance registers */ 196 if (offset > (0x1000000 - len) || !IS_ALIGNED(offset, len)) 197 return -EINVAL; 198 199 spin_lock_irqsave(&fsl_rio_config_lock, flags); 200 201 out_be32(&priv->maint_atmu_regs->rowtar, 202 (destid << 22) | (hopcount << 12) | (offset >> 12)); 203 out_be32(&priv->maint_atmu_regs->rowtear, (destid >> 10)); 204 205 data = (u8 *) priv->maint_win + (offset & (RIO_MAINT_WIN_SIZE - 1)); 206 switch (len) { 207 case 1: 208 __fsl_read_rio_config(rval, data, err, "lbz"); 209 break; 210 case 2: 211 __fsl_read_rio_config(rval, data, err, "lhz"); 212 break; 213 case 4: 214 __fsl_read_rio_config(rval, data, err, "lwz"); 215 break; 216 default: 217 spin_unlock_irqrestore(&fsl_rio_config_lock, flags); 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 spin_unlock_irqrestore(&fsl_rio_config_lock, flags); 227 *val = rval; 228 229 return err; 230 } 231 232 /** 233 * fsl_rio_config_write - Generate a MPC85xx write maintenance transaction 234 * @mport: RapidIO master port info 235 * @index: ID of RapdiIO interface 236 * @destid: Destination ID of transaction 237 * @hopcount: Number of hops to target device 238 * @offset: Offset into configuration space 239 * @len: Length (in bytes) of the maintenance transaction 240 * @val: Value to be written 241 * 242 * Generates an MPC85xx write maintenance transaction. Returns %0 on 243 * success or %-EINVAL on failure. 244 */ 245 static int 246 fsl_rio_config_write(struct rio_mport *mport, int index, u16 destid, 247 u8 hopcount, u32 offset, int len, u32 val) 248 { 249 struct rio_priv *priv = mport->priv; 250 unsigned long flags; 251 u8 *data; 252 int ret = 0; 253 254 pr_debug 255 ("fsl_rio_config_write:" 256 " index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n", 257 index, destid, hopcount, offset, len, val); 258 259 /* 16MB maintenance windows possible */ 260 /* allow only aligned access to maintenance registers */ 261 if (offset > (0x1000000 - len) || !IS_ALIGNED(offset, len)) 262 return -EINVAL; 263 264 spin_lock_irqsave(&fsl_rio_config_lock, flags); 265 266 out_be32(&priv->maint_atmu_regs->rowtar, 267 (destid << 22) | (hopcount << 12) | (offset >> 12)); 268 out_be32(&priv->maint_atmu_regs->rowtear, (destid >> 10)); 269 270 data = (u8 *) priv->maint_win + (offset & (RIO_MAINT_WIN_SIZE - 1)); 271 switch (len) { 272 case 1: 273 out_8((u8 *) data, val); 274 break; 275 case 2: 276 out_be16((u16 *) data, val); 277 break; 278 case 4: 279 out_be32((u32 *) data, val); 280 break; 281 default: 282 ret = -EINVAL; 283 } 284 spin_unlock_irqrestore(&fsl_rio_config_lock, flags); 285 286 return ret; 287 } 288 289 static void fsl_rio_inbound_mem_init(struct rio_priv *priv) 290 { 291 int i; 292 293 /* close inbound windows */ 294 for (i = 0; i < RIO_INB_ATMU_COUNT; i++) 295 out_be32(&priv->inb_atmu_regs[i].riwar, 0); 296 } 297 298 int fsl_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart, 299 u64 rstart, u64 size, u32 flags) 300 { 301 struct rio_priv *priv = mport->priv; 302 u32 base_size; 303 unsigned int base_size_log; 304 u64 win_start, win_end; 305 u32 riwar; 306 int i; 307 308 if ((size & (size - 1)) != 0 || size > 0x400000000ULL) 309 return -EINVAL; 310 311 base_size_log = ilog2(size); 312 base_size = 1 << base_size_log; 313 314 /* check if addresses are aligned with the window size */ 315 if (lstart & (base_size - 1)) 316 return -EINVAL; 317 if (rstart & (base_size - 1)) 318 return -EINVAL; 319 320 /* check for conflicting ranges */ 321 for (i = 0; i < RIO_INB_ATMU_COUNT; i++) { 322 riwar = in_be32(&priv->inb_atmu_regs[i].riwar); 323 if ((riwar & RIWAR_ENABLE) == 0) 324 continue; 325 win_start = ((u64)(in_be32(&priv->inb_atmu_regs[i].riwbar) & RIWBAR_BADD_MASK)) 326 << RIWBAR_BADD_VAL_SHIFT; 327 win_end = win_start + ((1 << ((riwar & RIWAR_SIZE_MASK) + 1)) - 1); 328 if (rstart < win_end && (rstart + size) > win_start) 329 return -EINVAL; 330 } 331 332 /* find unused atmu */ 333 for (i = 0; i < RIO_INB_ATMU_COUNT; i++) { 334 riwar = in_be32(&priv->inb_atmu_regs[i].riwar); 335 if ((riwar & RIWAR_ENABLE) == 0) 336 break; 337 } 338 if (i >= RIO_INB_ATMU_COUNT) 339 return -ENOMEM; 340 341 out_be32(&priv->inb_atmu_regs[i].riwtar, lstart >> RIWTAR_TRAD_VAL_SHIFT); 342 out_be32(&priv->inb_atmu_regs[i].riwbar, rstart >> RIWBAR_BADD_VAL_SHIFT); 343 out_be32(&priv->inb_atmu_regs[i].riwar, RIWAR_ENABLE | RIWAR_TGINT_LOCAL | 344 RIWAR_RDTYP_SNOOP | RIWAR_WRTYP_SNOOP | (base_size_log - 1)); 345 346 return 0; 347 } 348 349 void fsl_unmap_inb_mem(struct rio_mport *mport, dma_addr_t lstart) 350 { 351 u32 win_start_shift, base_start_shift; 352 struct rio_priv *priv = mport->priv; 353 u32 riwar, riwtar; 354 int i; 355 356 /* skip default window */ 357 base_start_shift = lstart >> RIWTAR_TRAD_VAL_SHIFT; 358 for (i = 0; i < RIO_INB_ATMU_COUNT; i++) { 359 riwar = in_be32(&priv->inb_atmu_regs[i].riwar); 360 if ((riwar & RIWAR_ENABLE) == 0) 361 continue; 362 363 riwtar = in_be32(&priv->inb_atmu_regs[i].riwtar); 364 win_start_shift = riwtar & RIWTAR_TRAD_MASK; 365 if (win_start_shift == base_start_shift) { 366 out_be32(&priv->inb_atmu_regs[i].riwar, riwar & ~RIWAR_ENABLE); 367 return; 368 } 369 } 370 } 371 372 void fsl_rio_port_error_handler(int offset) 373 { 374 /*XXX: Error recovery is not implemented, we just clear errors */ 375 out_be32((u32 *)(rio_regs_win + RIO_LTLEDCSR), 0); 376 377 if (offset == 0) { 378 out_be32((u32 *)(rio_regs_win + RIO_PORT1_EDCSR), 0); 379 out_be32((u32 *)(rio_regs_win + RIO_PORT1_IECSR), IECSR_CLEAR); 380 out_be32((u32 *)(rio_regs_win + RIO_ESCSR), ESCSR_CLEAR); 381 } else { 382 out_be32((u32 *)(rio_regs_win + RIO_PORT2_EDCSR), 0); 383 out_be32((u32 *)(rio_regs_win + RIO_PORT2_IECSR), IECSR_CLEAR); 384 out_be32((u32 *)(rio_regs_win + RIO_PORT2_ESCSR), ESCSR_CLEAR); 385 } 386 } 387 static inline void fsl_rio_info(struct device *dev, u32 ccsr) 388 { 389 const char *str; 390 if (ccsr & 1) { 391 /* Serial phy */ 392 switch (ccsr >> 30) { 393 case 0: 394 str = "1"; 395 break; 396 case 1: 397 str = "4"; 398 break; 399 default: 400 str = "Unknown"; 401 break; 402 } 403 dev_info(dev, "Hardware port width: %s\n", str); 404 405 switch ((ccsr >> 27) & 7) { 406 case 0: 407 str = "Single-lane 0"; 408 break; 409 case 1: 410 str = "Single-lane 2"; 411 break; 412 case 2: 413 str = "Four-lane"; 414 break; 415 default: 416 str = "Unknown"; 417 break; 418 } 419 dev_info(dev, "Training connection status: %s\n", str); 420 } else { 421 /* Parallel phy */ 422 if (!(ccsr & 0x80000000)) 423 dev_info(dev, "Output port operating in 8-bit mode\n"); 424 if (!(ccsr & 0x08000000)) 425 dev_info(dev, "Input port operating in 8-bit mode\n"); 426 } 427 } 428 429 /** 430 * fsl_rio_setup - Setup Freescale PowerPC RapidIO interface 431 * @dev: platform_device pointer 432 * 433 * Initializes MPC85xx RapidIO hardware interface, configures 434 * master port with system-specific info, and registers the 435 * master port with the RapidIO subsystem. 436 */ 437 int fsl_rio_setup(struct platform_device *dev) 438 { 439 struct rio_ops *ops; 440 struct rio_mport *port; 441 struct rio_priv *priv; 442 int rc = 0; 443 const u32 *dt_range, *cell, *port_index; 444 u32 active_ports = 0; 445 struct resource regs, rmu_regs; 446 struct device_node *np, *rmu_node; 447 int rlen; 448 u32 ccsr; 449 u64 range_start, range_size; 450 int paw, aw, sw; 451 u32 i; 452 static int tmp; 453 struct device_node *rmu_np[MAX_MSG_UNIT_NUM] = {NULL}; 454 455 if (!dev->dev.of_node) { 456 dev_err(&dev->dev, "Device OF-Node is NULL"); 457 return -ENODEV; 458 } 459 460 rc = of_address_to_resource(dev->dev.of_node, 0, ®s); 461 if (rc) { 462 dev_err(&dev->dev, "Can't get %pOF property 'reg'\n", 463 dev->dev.of_node); 464 return -EFAULT; 465 } 466 dev_info(&dev->dev, "Of-device full name %pOF\n", 467 dev->dev.of_node); 468 dev_info(&dev->dev, "Regs: %pR\n", ®s); 469 470 rio_regs_win = ioremap(regs.start, resource_size(®s)); 471 if (!rio_regs_win) { 472 dev_err(&dev->dev, "Unable to map rio register window\n"); 473 rc = -ENOMEM; 474 goto err_rio_regs; 475 } 476 477 ops = kzalloc(sizeof(struct rio_ops), GFP_KERNEL); 478 if (!ops) { 479 rc = -ENOMEM; 480 goto err_ops; 481 } 482 ops->lcread = fsl_local_config_read; 483 ops->lcwrite = fsl_local_config_write; 484 ops->cread = fsl_rio_config_read; 485 ops->cwrite = fsl_rio_config_write; 486 ops->dsend = fsl_rio_doorbell_send; 487 ops->pwenable = fsl_rio_pw_enable; 488 ops->open_outb_mbox = fsl_open_outb_mbox; 489 ops->open_inb_mbox = fsl_open_inb_mbox; 490 ops->close_outb_mbox = fsl_close_outb_mbox; 491 ops->close_inb_mbox = fsl_close_inb_mbox; 492 ops->add_outb_message = fsl_add_outb_message; 493 ops->add_inb_buffer = fsl_add_inb_buffer; 494 ops->get_inb_message = fsl_get_inb_message; 495 ops->map_inb = fsl_map_inb_mem; 496 ops->unmap_inb = fsl_unmap_inb_mem; 497 498 rmu_node = of_parse_phandle(dev->dev.of_node, "fsl,srio-rmu-handle", 0); 499 if (!rmu_node) { 500 dev_err(&dev->dev, "No valid fsl,srio-rmu-handle property\n"); 501 rc = -ENOENT; 502 goto err_rmu; 503 } 504 rc = of_address_to_resource(rmu_node, 0, &rmu_regs); 505 if (rc) { 506 dev_err(&dev->dev, "Can't get %pOF property 'reg'\n", 507 rmu_node); 508 goto err_rmu; 509 } 510 rmu_regs_win = ioremap(rmu_regs.start, resource_size(&rmu_regs)); 511 if (!rmu_regs_win) { 512 dev_err(&dev->dev, "Unable to map rmu register window\n"); 513 rc = -ENOMEM; 514 goto err_rmu; 515 } 516 for_each_compatible_node(np, NULL, "fsl,srio-msg-unit") { 517 rmu_np[tmp] = np; 518 tmp++; 519 } 520 521 /*set up doobell node*/ 522 np = of_find_compatible_node(NULL, NULL, "fsl,srio-dbell-unit"); 523 if (!np) { 524 dev_err(&dev->dev, "No fsl,srio-dbell-unit node\n"); 525 rc = -ENODEV; 526 goto err_dbell; 527 } 528 dbell = kzalloc(sizeof(struct fsl_rio_dbell), GFP_KERNEL); 529 if (!(dbell)) { 530 dev_err(&dev->dev, "Can't alloc memory for 'fsl_rio_dbell'\n"); 531 rc = -ENOMEM; 532 goto err_dbell; 533 } 534 dbell->dev = &dev->dev; 535 dbell->bellirq = irq_of_parse_and_map(np, 1); 536 dev_info(&dev->dev, "bellirq: %d\n", dbell->bellirq); 537 538 aw = of_n_addr_cells(np); 539 dt_range = of_get_property(np, "reg", &rlen); 540 if (!dt_range) { 541 pr_err("%pOF: unable to find 'reg' property\n", 542 np); 543 rc = -ENOMEM; 544 goto err_pw; 545 } 546 range_start = of_read_number(dt_range, aw); 547 dbell->dbell_regs = (struct rio_dbell_regs *)(rmu_regs_win + 548 (u32)range_start); 549 550 /*set up port write node*/ 551 np = of_find_compatible_node(NULL, NULL, "fsl,srio-port-write-unit"); 552 if (!np) { 553 dev_err(&dev->dev, "No fsl,srio-port-write-unit node\n"); 554 rc = -ENODEV; 555 goto err_pw; 556 } 557 pw = kzalloc(sizeof(struct fsl_rio_pw), GFP_KERNEL); 558 if (!(pw)) { 559 dev_err(&dev->dev, "Can't alloc memory for 'fsl_rio_pw'\n"); 560 rc = -ENOMEM; 561 goto err_pw; 562 } 563 pw->dev = &dev->dev; 564 pw->pwirq = irq_of_parse_and_map(np, 0); 565 dev_info(&dev->dev, "pwirq: %d\n", pw->pwirq); 566 aw = of_n_addr_cells(np); 567 dt_range = of_get_property(np, "reg", &rlen); 568 if (!dt_range) { 569 pr_err("%pOF: unable to find 'reg' property\n", 570 np); 571 rc = -ENOMEM; 572 goto err; 573 } 574 range_start = of_read_number(dt_range, aw); 575 pw->pw_regs = (struct rio_pw_regs *)(rmu_regs_win + (u32)range_start); 576 577 /*set up ports node*/ 578 for_each_child_of_node(dev->dev.of_node, np) { 579 port_index = of_get_property(np, "cell-index", NULL); 580 if (!port_index) { 581 dev_err(&dev->dev, "Can't get %pOF property 'cell-index'\n", 582 np); 583 continue; 584 } 585 586 dt_range = of_get_property(np, "ranges", &rlen); 587 if (!dt_range) { 588 dev_err(&dev->dev, "Can't get %pOF property 'ranges'\n", 589 np); 590 continue; 591 } 592 593 /* Get node address wide */ 594 cell = of_get_property(np, "#address-cells", NULL); 595 if (cell) 596 aw = *cell; 597 else 598 aw = of_n_addr_cells(np); 599 /* Get node size wide */ 600 cell = of_get_property(np, "#size-cells", NULL); 601 if (cell) 602 sw = *cell; 603 else 604 sw = of_n_size_cells(np); 605 /* Get parent address wide wide */ 606 paw = of_n_addr_cells(np); 607 range_start = of_read_number(dt_range + aw, paw); 608 range_size = of_read_number(dt_range + aw + paw, sw); 609 610 dev_info(&dev->dev, "%pOF: LAW start 0x%016llx, size 0x%016llx.\n", 611 np, range_start, range_size); 612 613 port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL); 614 if (!port) 615 continue; 616 617 rc = rio_mport_initialize(port); 618 if (rc) { 619 kfree(port); 620 continue; 621 } 622 623 i = *port_index - 1; 624 port->index = (unsigned char)i; 625 626 priv = kzalloc(sizeof(struct rio_priv), GFP_KERNEL); 627 if (!priv) { 628 dev_err(&dev->dev, "Can't alloc memory for 'priv'\n"); 629 kfree(port); 630 continue; 631 } 632 633 INIT_LIST_HEAD(&port->dbells); 634 port->iores.start = range_start; 635 port->iores.end = port->iores.start + range_size - 1; 636 port->iores.flags = IORESOURCE_MEM; 637 port->iores.name = "rio_io_win"; 638 639 if (request_resource(&iomem_resource, &port->iores) < 0) { 640 dev_err(&dev->dev, "RIO: Error requesting master port region" 641 " 0x%016llx-0x%016llx\n", 642 (u64)port->iores.start, (u64)port->iores.end); 643 kfree(priv); 644 kfree(port); 645 continue; 646 } 647 sprintf(port->name, "RIO mport %d", i); 648 649 priv->dev = &dev->dev; 650 port->dev.parent = &dev->dev; 651 port->ops = ops; 652 port->priv = priv; 653 port->phys_efptr = 0x100; 654 port->phys_rmap = 1; 655 priv->regs_win = rio_regs_win; 656 657 ccsr = in_be32(priv->regs_win + RIO_CCSR + i*0x20); 658 659 /* Checking the port training status */ 660 if (in_be32((priv->regs_win + RIO_ESCSR + i*0x20)) & 1) { 661 dev_err(&dev->dev, "Port %d is not ready. " 662 "Try to restart connection...\n", i); 663 /* Disable ports */ 664 out_be32(priv->regs_win 665 + RIO_CCSR + i*0x20, 0); 666 /* Set 1x lane */ 667 setbits32(priv->regs_win 668 + RIO_CCSR + i*0x20, 0x02000000); 669 /* Enable ports */ 670 setbits32(priv->regs_win 671 + RIO_CCSR + i*0x20, 0x00600000); 672 msleep(100); 673 if (in_be32((priv->regs_win 674 + RIO_ESCSR + i*0x20)) & 1) { 675 dev_err(&dev->dev, 676 "Port %d restart failed.\n", i); 677 release_resource(&port->iores); 678 kfree(priv); 679 kfree(port); 680 continue; 681 } 682 dev_info(&dev->dev, "Port %d restart success!\n", i); 683 } 684 fsl_rio_info(&dev->dev, ccsr); 685 686 port->sys_size = (in_be32((priv->regs_win + RIO_PEF_CAR)) 687 & RIO_PEF_CTLS) >> 4; 688 dev_info(&dev->dev, "RapidIO Common Transport System size: %d\n", 689 port->sys_size ? 65536 : 256); 690 691 if (port->host_deviceid >= 0) 692 out_be32(priv->regs_win + RIO_GCCSR, RIO_PORT_GEN_HOST | 693 RIO_PORT_GEN_MASTER | RIO_PORT_GEN_DISCOVERED); 694 else 695 out_be32(priv->regs_win + RIO_GCCSR, 696 RIO_PORT_GEN_MASTER); 697 698 priv->atmu_regs = (struct rio_atmu_regs *)(priv->regs_win 699 + ((i == 0) ? RIO_ATMU_REGS_PORT1_OFFSET : 700 RIO_ATMU_REGS_PORT2_OFFSET)); 701 702 priv->maint_atmu_regs = priv->atmu_regs + 1; 703 priv->inb_atmu_regs = (struct rio_inb_atmu_regs __iomem *) 704 (priv->regs_win + 705 ((i == 0) ? RIO_INB_ATMU_REGS_PORT1_OFFSET : 706 RIO_INB_ATMU_REGS_PORT2_OFFSET)); 707 708 /* Set to receive packets with any dest ID */ 709 out_be32((priv->regs_win + RIO_ISR_AACR + i*0x80), 710 RIO_ISR_AACR_AA); 711 712 /* Configure maintenance transaction window */ 713 out_be32(&priv->maint_atmu_regs->rowbar, 714 port->iores.start >> 12); 715 out_be32(&priv->maint_atmu_regs->rowar, 716 0x80077000 | (ilog2(RIO_MAINT_WIN_SIZE) - 1)); 717 718 priv->maint_win = ioremap(port->iores.start, 719 RIO_MAINT_WIN_SIZE); 720 721 rio_law_start = range_start; 722 723 fsl_rio_setup_rmu(port, rmu_np[i]); 724 fsl_rio_inbound_mem_init(priv); 725 726 dbell->mport[i] = port; 727 pw->mport[i] = port; 728 729 if (rio_register_mport(port)) { 730 release_resource(&port->iores); 731 kfree(priv); 732 kfree(port); 733 continue; 734 } 735 active_ports++; 736 } 737 738 if (!active_ports) { 739 rc = -ENOLINK; 740 goto err; 741 } 742 743 fsl_rio_doorbell_init(dbell); 744 fsl_rio_port_write_init(pw); 745 746 return 0; 747 err: 748 kfree(pw); 749 pw = NULL; 750 err_pw: 751 kfree(dbell); 752 dbell = NULL; 753 err_dbell: 754 iounmap(rmu_regs_win); 755 rmu_regs_win = NULL; 756 err_rmu: 757 kfree(ops); 758 err_ops: 759 iounmap(rio_regs_win); 760 rio_regs_win = NULL; 761 err_rio_regs: 762 return rc; 763 } 764 765 /* The probe function for RapidIO peer-to-peer network. 766 */ 767 static int fsl_of_rio_rpn_probe(struct platform_device *dev) 768 { 769 printk(KERN_INFO "Setting up RapidIO peer-to-peer network %pOF\n", 770 dev->dev.of_node); 771 772 return fsl_rio_setup(dev); 773 }; 774 775 static const struct of_device_id fsl_of_rio_rpn_ids[] = { 776 { 777 .compatible = "fsl,srio", 778 }, 779 {}, 780 }; 781 782 static struct platform_driver fsl_of_rio_rpn_driver = { 783 .driver = { 784 .name = "fsl-of-rio", 785 .of_match_table = fsl_of_rio_rpn_ids, 786 }, 787 .probe = fsl_of_rio_rpn_probe, 788 }; 789 790 static __init int fsl_of_rio_rpn_init(void) 791 { 792 return platform_driver_register(&fsl_of_rio_rpn_driver); 793 } 794 795 subsys_initcall(fsl_of_rio_rpn_init); 796