1 /* 2 * Address map functions for Marvell EBU SoCs (Kirkwood, Armada 3 * 370/XP, Dove, Orion5x and MV78xx0) 4 * 5 * This file is licensed under the terms of the GNU General Public 6 * License version 2. This program is licensed "as is" without any 7 * warranty of any kind, whether express or implied. 8 * 9 * The Marvell EBU SoCs have a configurable physical address space: 10 * the physical address at which certain devices (PCIe, NOR, NAND, 11 * etc.) sit can be configured. The configuration takes place through 12 * two sets of registers: 13 * 14 * - One to configure the access of the CPU to the devices. Depending 15 * on the families, there are between 8 and 20 configurable windows, 16 * each can be use to create a physical memory window that maps to a 17 * specific device. Devices are identified by a tuple (target, 18 * attribute). 19 * 20 * - One to configure the access to the CPU to the SDRAM. There are 21 * either 2 (for Dove) or 4 (for other families) windows to map the 22 * SDRAM into the physical address space. 23 * 24 * This driver: 25 * 26 * - Reads out the SDRAM address decoding windows at initialization 27 * time, and fills the mvebu_mbus_dram_info structure with these 28 * informations. The exported function mv_mbus_dram_info() allow 29 * device drivers to get those informations related to the SDRAM 30 * address decoding windows. This is because devices also have their 31 * own windows (configured through registers that are part of each 32 * device register space), and therefore the drivers for Marvell 33 * devices have to configure those device -> SDRAM windows to ensure 34 * that DMA works properly. 35 * 36 * - Provides an API for platform code or device drivers to 37 * dynamically add or remove address decoding windows for the CPU -> 38 * device accesses. This API is mvebu_mbus_add_window_by_id(), 39 * mvebu_mbus_add_window_remap_by_id() and 40 * mvebu_mbus_del_window(). 41 * 42 * - Provides a debugfs interface in /sys/kernel/debug/mvebu-mbus/ to 43 * see the list of CPU -> SDRAM windows and their configuration 44 * (file 'sdram') and the list of CPU -> devices windows and their 45 * configuration (file 'devices'). 46 */ 47 48 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 49 50 #include <linux/kernel.h> 51 #include <linux/module.h> 52 #include <linux/init.h> 53 #include <linux/mbus.h> 54 #include <linux/io.h> 55 #include <linux/ioport.h> 56 #include <linux/of.h> 57 #include <linux/of_address.h> 58 #include <linux/debugfs.h> 59 #include <linux/log2.h> 60 #include <linux/memblock.h> 61 #include <linux/syscore_ops.h> 62 63 /* 64 * DDR target is the same on all platforms. 65 */ 66 #define TARGET_DDR 0 67 68 /* 69 * CPU Address Decode Windows registers 70 */ 71 #define WIN_CTRL_OFF 0x0000 72 #define WIN_CTRL_ENABLE BIT(0) 73 /* Only on HW I/O coherency capable platforms */ 74 #define WIN_CTRL_SYNCBARRIER BIT(1) 75 #define WIN_CTRL_TGT_MASK 0xf0 76 #define WIN_CTRL_TGT_SHIFT 4 77 #define WIN_CTRL_ATTR_MASK 0xff00 78 #define WIN_CTRL_ATTR_SHIFT 8 79 #define WIN_CTRL_SIZE_MASK 0xffff0000 80 #define WIN_CTRL_SIZE_SHIFT 16 81 #define WIN_BASE_OFF 0x0004 82 #define WIN_BASE_LOW 0xffff0000 83 #define WIN_BASE_HIGH 0xf 84 #define WIN_REMAP_LO_OFF 0x0008 85 #define WIN_REMAP_LOW 0xffff0000 86 #define WIN_REMAP_HI_OFF 0x000c 87 88 #define UNIT_SYNC_BARRIER_OFF 0x84 89 #define UNIT_SYNC_BARRIER_ALL 0xFFFF 90 91 #define ATTR_HW_COHERENCY (0x1 << 4) 92 93 #define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3)) 94 #define DDR_BASE_CS_HIGH_MASK 0xf 95 #define DDR_BASE_CS_LOW_MASK 0xff000000 96 #define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3)) 97 #define DDR_SIZE_ENABLED BIT(0) 98 #define DDR_SIZE_CS_MASK 0x1c 99 #define DDR_SIZE_CS_SHIFT 2 100 #define DDR_SIZE_MASK 0xff000000 101 102 #define DOVE_DDR_BASE_CS_OFF(n) ((n) << 4) 103 104 /* Relative to mbusbridge_base */ 105 #define MBUS_BRIDGE_CTRL_OFF 0x0 106 #define MBUS_BRIDGE_BASE_OFF 0x4 107 108 /* Maximum number of windows, for all known platforms */ 109 #define MBUS_WINS_MAX 20 110 111 struct mvebu_mbus_state; 112 113 struct mvebu_mbus_soc_data { 114 unsigned int num_wins; 115 bool has_mbus_bridge; 116 unsigned int (*win_cfg_offset)(const int win); 117 unsigned int (*win_remap_offset)(const int win); 118 void (*setup_cpu_target)(struct mvebu_mbus_state *s); 119 int (*save_cpu_target)(struct mvebu_mbus_state *s, 120 u32 __iomem *store_addr); 121 int (*show_cpu_target)(struct mvebu_mbus_state *s, 122 struct seq_file *seq, void *v); 123 }; 124 125 /* 126 * Used to store the state of one MBus window accross suspend/resume. 127 */ 128 struct mvebu_mbus_win_data { 129 u32 ctrl; 130 u32 base; 131 u32 remap_lo; 132 u32 remap_hi; 133 }; 134 135 struct mvebu_mbus_state { 136 void __iomem *mbuswins_base; 137 void __iomem *sdramwins_base; 138 void __iomem *mbusbridge_base; 139 phys_addr_t sdramwins_phys_base; 140 struct dentry *debugfs_root; 141 struct dentry *debugfs_sdram; 142 struct dentry *debugfs_devs; 143 struct resource pcie_mem_aperture; 144 struct resource pcie_io_aperture; 145 const struct mvebu_mbus_soc_data *soc; 146 int hw_io_coherency; 147 148 /* Used during suspend/resume */ 149 u32 mbus_bridge_ctrl; 150 u32 mbus_bridge_base; 151 struct mvebu_mbus_win_data wins[MBUS_WINS_MAX]; 152 }; 153 154 static struct mvebu_mbus_state mbus_state; 155 156 /* 157 * We provide two variants of the mv_mbus_dram_info() function: 158 * 159 * - The normal one, where the described DRAM ranges may overlap with 160 * the I/O windows, but for which the DRAM ranges are guaranteed to 161 * have a power of two size. Such ranges are suitable for the DMA 162 * masters that only DMA between the RAM and the device, which is 163 * actually all devices except the crypto engines. 164 * 165 * - The 'nooverlap' one, where the described DRAM ranges are 166 * guaranteed to not overlap with the I/O windows, but for which the 167 * DRAM ranges will not have power of two sizes. They will only be 168 * aligned on a 64 KB boundary, and have a size multiple of 64 169 * KB. Such ranges are suitable for the DMA masters that DMA between 170 * the crypto SRAM (which is mapped through an I/O window) and a 171 * device. This is the case for the crypto engines. 172 */ 173 174 static struct mbus_dram_target_info mvebu_mbus_dram_info; 175 static struct mbus_dram_target_info mvebu_mbus_dram_info_nooverlap; 176 177 const struct mbus_dram_target_info *mv_mbus_dram_info(void) 178 { 179 return &mvebu_mbus_dram_info; 180 } 181 EXPORT_SYMBOL_GPL(mv_mbus_dram_info); 182 183 const struct mbus_dram_target_info *mv_mbus_dram_info_nooverlap(void) 184 { 185 return &mvebu_mbus_dram_info_nooverlap; 186 } 187 EXPORT_SYMBOL_GPL(mv_mbus_dram_info_nooverlap); 188 189 /* Checks whether the given window has remap capability */ 190 static bool mvebu_mbus_window_is_remappable(struct mvebu_mbus_state *mbus, 191 const int win) 192 { 193 return mbus->soc->win_remap_offset(win) != MVEBU_MBUS_NO_REMAP; 194 } 195 196 /* 197 * Functions to manipulate the address decoding windows 198 */ 199 200 static void mvebu_mbus_read_window(struct mvebu_mbus_state *mbus, 201 int win, int *enabled, u64 *base, 202 u32 *size, u8 *target, u8 *attr, 203 u64 *remap) 204 { 205 void __iomem *addr = mbus->mbuswins_base + 206 mbus->soc->win_cfg_offset(win); 207 u32 basereg = readl(addr + WIN_BASE_OFF); 208 u32 ctrlreg = readl(addr + WIN_CTRL_OFF); 209 210 if (!(ctrlreg & WIN_CTRL_ENABLE)) { 211 *enabled = 0; 212 return; 213 } 214 215 *enabled = 1; 216 *base = ((u64)basereg & WIN_BASE_HIGH) << 32; 217 *base |= (basereg & WIN_BASE_LOW); 218 *size = (ctrlreg | ~WIN_CTRL_SIZE_MASK) + 1; 219 220 if (target) 221 *target = (ctrlreg & WIN_CTRL_TGT_MASK) >> WIN_CTRL_TGT_SHIFT; 222 223 if (attr) 224 *attr = (ctrlreg & WIN_CTRL_ATTR_MASK) >> WIN_CTRL_ATTR_SHIFT; 225 226 if (remap) { 227 if (mvebu_mbus_window_is_remappable(mbus, win)) { 228 u32 remap_low, remap_hi; 229 void __iomem *addr_rmp = mbus->mbuswins_base + 230 mbus->soc->win_remap_offset(win); 231 remap_low = readl(addr_rmp + WIN_REMAP_LO_OFF); 232 remap_hi = readl(addr_rmp + WIN_REMAP_HI_OFF); 233 *remap = ((u64)remap_hi << 32) | remap_low; 234 } else 235 *remap = 0; 236 } 237 } 238 239 static void mvebu_mbus_disable_window(struct mvebu_mbus_state *mbus, 240 int win) 241 { 242 void __iomem *addr; 243 244 addr = mbus->mbuswins_base + mbus->soc->win_cfg_offset(win); 245 writel(0, addr + WIN_BASE_OFF); 246 writel(0, addr + WIN_CTRL_OFF); 247 248 if (mvebu_mbus_window_is_remappable(mbus, win)) { 249 addr = mbus->mbuswins_base + mbus->soc->win_remap_offset(win); 250 writel(0, addr + WIN_REMAP_LO_OFF); 251 writel(0, addr + WIN_REMAP_HI_OFF); 252 } 253 } 254 255 /* Checks whether the given window number is available */ 256 257 static int mvebu_mbus_window_is_free(struct mvebu_mbus_state *mbus, 258 const int win) 259 { 260 void __iomem *addr = mbus->mbuswins_base + 261 mbus->soc->win_cfg_offset(win); 262 u32 ctrl = readl(addr + WIN_CTRL_OFF); 263 264 return !(ctrl & WIN_CTRL_ENABLE); 265 } 266 267 /* 268 * Checks whether the given (base, base+size) area doesn't overlap an 269 * existing region 270 */ 271 static int mvebu_mbus_window_conflicts(struct mvebu_mbus_state *mbus, 272 phys_addr_t base, size_t size, 273 u8 target, u8 attr) 274 { 275 u64 end = (u64)base + size; 276 int win; 277 278 for (win = 0; win < mbus->soc->num_wins; win++) { 279 u64 wbase, wend; 280 u32 wsize; 281 u8 wtarget, wattr; 282 int enabled; 283 284 mvebu_mbus_read_window(mbus, win, 285 &enabled, &wbase, &wsize, 286 &wtarget, &wattr, NULL); 287 288 if (!enabled) 289 continue; 290 291 wend = wbase + wsize; 292 293 /* 294 * Check if the current window overlaps with the 295 * proposed physical range 296 */ 297 if ((u64)base < wend && end > wbase) 298 return 0; 299 } 300 301 return 1; 302 } 303 304 static int mvebu_mbus_find_window(struct mvebu_mbus_state *mbus, 305 phys_addr_t base, size_t size) 306 { 307 int win; 308 309 for (win = 0; win < mbus->soc->num_wins; win++) { 310 u64 wbase; 311 u32 wsize; 312 int enabled; 313 314 mvebu_mbus_read_window(mbus, win, 315 &enabled, &wbase, &wsize, 316 NULL, NULL, NULL); 317 318 if (!enabled) 319 continue; 320 321 if (base == wbase && size == wsize) 322 return win; 323 } 324 325 return -ENODEV; 326 } 327 328 static int mvebu_mbus_setup_window(struct mvebu_mbus_state *mbus, 329 int win, phys_addr_t base, size_t size, 330 phys_addr_t remap, u8 target, 331 u8 attr) 332 { 333 void __iomem *addr = mbus->mbuswins_base + 334 mbus->soc->win_cfg_offset(win); 335 u32 ctrl, remap_addr; 336 337 if (!is_power_of_2(size)) { 338 WARN(true, "Invalid MBus window size: 0x%zx\n", size); 339 return -EINVAL; 340 } 341 342 if ((base & (phys_addr_t)(size - 1)) != 0) { 343 WARN(true, "Invalid MBus base/size: %pa len 0x%zx\n", &base, 344 size); 345 return -EINVAL; 346 } 347 348 ctrl = ((size - 1) & WIN_CTRL_SIZE_MASK) | 349 (attr << WIN_CTRL_ATTR_SHIFT) | 350 (target << WIN_CTRL_TGT_SHIFT) | 351 WIN_CTRL_ENABLE; 352 if (mbus->hw_io_coherency) 353 ctrl |= WIN_CTRL_SYNCBARRIER; 354 355 writel(base & WIN_BASE_LOW, addr + WIN_BASE_OFF); 356 writel(ctrl, addr + WIN_CTRL_OFF); 357 358 if (mvebu_mbus_window_is_remappable(mbus, win)) { 359 void __iomem *addr_rmp = mbus->mbuswins_base + 360 mbus->soc->win_remap_offset(win); 361 362 if (remap == MVEBU_MBUS_NO_REMAP) 363 remap_addr = base; 364 else 365 remap_addr = remap; 366 writel(remap_addr & WIN_REMAP_LOW, addr_rmp + WIN_REMAP_LO_OFF); 367 writel(0, addr_rmp + WIN_REMAP_HI_OFF); 368 } 369 370 return 0; 371 } 372 373 static int mvebu_mbus_alloc_window(struct mvebu_mbus_state *mbus, 374 phys_addr_t base, size_t size, 375 phys_addr_t remap, u8 target, 376 u8 attr) 377 { 378 int win; 379 380 if (remap == MVEBU_MBUS_NO_REMAP) { 381 for (win = 0; win < mbus->soc->num_wins; win++) { 382 if (mvebu_mbus_window_is_remappable(mbus, win)) 383 continue; 384 385 if (mvebu_mbus_window_is_free(mbus, win)) 386 return mvebu_mbus_setup_window(mbus, win, base, 387 size, remap, 388 target, attr); 389 } 390 } 391 392 for (win = 0; win < mbus->soc->num_wins; win++) { 393 /* Skip window if need remap but is not supported */ 394 if ((remap != MVEBU_MBUS_NO_REMAP) && 395 !mvebu_mbus_window_is_remappable(mbus, win)) 396 continue; 397 398 if (mvebu_mbus_window_is_free(mbus, win)) 399 return mvebu_mbus_setup_window(mbus, win, base, size, 400 remap, target, attr); 401 } 402 403 return -ENOMEM; 404 } 405 406 /* 407 * Debugfs debugging 408 */ 409 410 /* Common function used for Dove, Kirkwood, Armada 370/XP and Orion 5x */ 411 static int mvebu_sdram_debug_show_orion(struct mvebu_mbus_state *mbus, 412 struct seq_file *seq, void *v) 413 { 414 int i; 415 416 for (i = 0; i < 4; i++) { 417 u32 basereg = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i)); 418 u32 sizereg = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i)); 419 u64 base; 420 u32 size; 421 422 if (!(sizereg & DDR_SIZE_ENABLED)) { 423 seq_printf(seq, "[%d] disabled\n", i); 424 continue; 425 } 426 427 base = ((u64)basereg & DDR_BASE_CS_HIGH_MASK) << 32; 428 base |= basereg & DDR_BASE_CS_LOW_MASK; 429 size = (sizereg | ~DDR_SIZE_MASK); 430 431 seq_printf(seq, "[%d] %016llx - %016llx : cs%d\n", 432 i, (unsigned long long)base, 433 (unsigned long long)base + size + 1, 434 (sizereg & DDR_SIZE_CS_MASK) >> DDR_SIZE_CS_SHIFT); 435 } 436 437 return 0; 438 } 439 440 /* Special function for Dove */ 441 static int mvebu_sdram_debug_show_dove(struct mvebu_mbus_state *mbus, 442 struct seq_file *seq, void *v) 443 { 444 int i; 445 446 for (i = 0; i < 2; i++) { 447 u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i)); 448 u64 base; 449 u32 size; 450 451 if (!(map & 1)) { 452 seq_printf(seq, "[%d] disabled\n", i); 453 continue; 454 } 455 456 base = map & 0xff800000; 457 size = 0x100000 << (((map & 0x000f0000) >> 16) - 4); 458 459 seq_printf(seq, "[%d] %016llx - %016llx : cs%d\n", 460 i, (unsigned long long)base, 461 (unsigned long long)base + size, i); 462 } 463 464 return 0; 465 } 466 467 static int mvebu_sdram_debug_show(struct seq_file *seq, void *v) 468 { 469 struct mvebu_mbus_state *mbus = &mbus_state; 470 return mbus->soc->show_cpu_target(mbus, seq, v); 471 } 472 473 static int mvebu_sdram_debug_open(struct inode *inode, struct file *file) 474 { 475 return single_open(file, mvebu_sdram_debug_show, inode->i_private); 476 } 477 478 static const struct file_operations mvebu_sdram_debug_fops = { 479 .open = mvebu_sdram_debug_open, 480 .read = seq_read, 481 .llseek = seq_lseek, 482 .release = single_release, 483 }; 484 485 static int mvebu_devs_debug_show(struct seq_file *seq, void *v) 486 { 487 struct mvebu_mbus_state *mbus = &mbus_state; 488 int win; 489 490 for (win = 0; win < mbus->soc->num_wins; win++) { 491 u64 wbase, wremap; 492 u32 wsize; 493 u8 wtarget, wattr; 494 int enabled; 495 496 mvebu_mbus_read_window(mbus, win, 497 &enabled, &wbase, &wsize, 498 &wtarget, &wattr, &wremap); 499 500 if (!enabled) { 501 seq_printf(seq, "[%02d] disabled\n", win); 502 continue; 503 } 504 505 seq_printf(seq, "[%02d] %016llx - %016llx : %04x:%04x", 506 win, (unsigned long long)wbase, 507 (unsigned long long)(wbase + wsize), wtarget, wattr); 508 509 if (!is_power_of_2(wsize) || 510 ((wbase & (u64)(wsize - 1)) != 0)) 511 seq_puts(seq, " (Invalid base/size!!)"); 512 513 if (mvebu_mbus_window_is_remappable(mbus, win)) { 514 seq_printf(seq, " (remap %016llx)\n", 515 (unsigned long long)wremap); 516 } else 517 seq_printf(seq, "\n"); 518 } 519 520 return 0; 521 } 522 523 static int mvebu_devs_debug_open(struct inode *inode, struct file *file) 524 { 525 return single_open(file, mvebu_devs_debug_show, inode->i_private); 526 } 527 528 static const struct file_operations mvebu_devs_debug_fops = { 529 .open = mvebu_devs_debug_open, 530 .read = seq_read, 531 .llseek = seq_lseek, 532 .release = single_release, 533 }; 534 535 /* 536 * SoC-specific functions and definitions 537 */ 538 539 static unsigned int generic_mbus_win_cfg_offset(int win) 540 { 541 return win << 4; 542 } 543 544 static unsigned int armada_370_xp_mbus_win_cfg_offset(int win) 545 { 546 /* The register layout is a bit annoying and the below code 547 * tries to cope with it. 548 * - At offset 0x0, there are the registers for the first 8 549 * windows, with 4 registers of 32 bits per window (ctrl, 550 * base, remap low, remap high) 551 * - Then at offset 0x80, there is a hole of 0x10 bytes for 552 * the internal registers base address and internal units 553 * sync barrier register. 554 * - Then at offset 0x90, there the registers for 12 555 * windows, with only 2 registers of 32 bits per window 556 * (ctrl, base). 557 */ 558 if (win < 8) 559 return win << 4; 560 else 561 return 0x90 + ((win - 8) << 3); 562 } 563 564 static unsigned int mv78xx0_mbus_win_cfg_offset(int win) 565 { 566 if (win < 8) 567 return win << 4; 568 else 569 return 0x900 + ((win - 8) << 4); 570 } 571 572 static unsigned int generic_mbus_win_remap_2_offset(int win) 573 { 574 if (win < 2) 575 return generic_mbus_win_cfg_offset(win); 576 else 577 return MVEBU_MBUS_NO_REMAP; 578 } 579 580 static unsigned int generic_mbus_win_remap_4_offset(int win) 581 { 582 if (win < 4) 583 return generic_mbus_win_cfg_offset(win); 584 else 585 return MVEBU_MBUS_NO_REMAP; 586 } 587 588 static unsigned int generic_mbus_win_remap_8_offset(int win) 589 { 590 if (win < 8) 591 return generic_mbus_win_cfg_offset(win); 592 else 593 return MVEBU_MBUS_NO_REMAP; 594 } 595 596 static unsigned int armada_xp_mbus_win_remap_offset(int win) 597 { 598 if (win < 8) 599 return generic_mbus_win_cfg_offset(win); 600 else if (win == 13) 601 return 0xF0 - WIN_REMAP_LO_OFF; 602 else 603 return MVEBU_MBUS_NO_REMAP; 604 } 605 606 /* 607 * Use the memblock information to find the MBus bridge hole in the 608 * physical address space. 609 */ 610 static void __init 611 mvebu_mbus_find_bridge_hole(uint64_t *start, uint64_t *end) 612 { 613 struct memblock_region *r; 614 uint64_t s = 0; 615 616 for_each_memblock(memory, r) { 617 /* 618 * This part of the memory is above 4 GB, so we don't 619 * care for the MBus bridge hole. 620 */ 621 if (r->base >= 0x100000000ULL) 622 continue; 623 624 /* 625 * The MBus bridge hole is at the end of the RAM under 626 * the 4 GB limit. 627 */ 628 if (r->base + r->size > s) 629 s = r->base + r->size; 630 } 631 632 *start = s; 633 *end = 0x100000000ULL; 634 } 635 636 /* 637 * This function fills in the mvebu_mbus_dram_info_nooverlap data 638 * structure, by looking at the mvebu_mbus_dram_info data, and 639 * removing the parts of it that overlap with I/O windows. 640 */ 641 static void __init 642 mvebu_mbus_setup_cpu_target_nooverlap(struct mvebu_mbus_state *mbus) 643 { 644 uint64_t mbus_bridge_base, mbus_bridge_end; 645 int cs_nooverlap = 0; 646 int i; 647 648 mvebu_mbus_find_bridge_hole(&mbus_bridge_base, &mbus_bridge_end); 649 650 for (i = 0; i < mvebu_mbus_dram_info.num_cs; i++) { 651 struct mbus_dram_window *w; 652 u64 base, size, end; 653 654 w = &mvebu_mbus_dram_info.cs[i]; 655 base = w->base; 656 size = w->size; 657 end = base + size; 658 659 /* 660 * The CS is fully enclosed inside the MBus bridge 661 * area, so ignore it. 662 */ 663 if (base >= mbus_bridge_base && end <= mbus_bridge_end) 664 continue; 665 666 /* 667 * Beginning of CS overlaps with end of MBus, raise CS 668 * base address, and shrink its size. 669 */ 670 if (base >= mbus_bridge_base && end > mbus_bridge_end) { 671 size -= mbus_bridge_end - base; 672 base = mbus_bridge_end; 673 } 674 675 /* 676 * End of CS overlaps with beginning of MBus, shrink 677 * CS size. 678 */ 679 if (base < mbus_bridge_base && end > mbus_bridge_base) 680 size -= end - mbus_bridge_base; 681 682 w = &mvebu_mbus_dram_info_nooverlap.cs[cs_nooverlap++]; 683 w->cs_index = i; 684 w->mbus_attr = 0xf & ~(1 << i); 685 if (mbus->hw_io_coherency) 686 w->mbus_attr |= ATTR_HW_COHERENCY; 687 w->base = base; 688 w->size = size; 689 } 690 691 mvebu_mbus_dram_info_nooverlap.mbus_dram_target_id = TARGET_DDR; 692 mvebu_mbus_dram_info_nooverlap.num_cs = cs_nooverlap; 693 } 694 695 static void __init 696 mvebu_mbus_default_setup_cpu_target(struct mvebu_mbus_state *mbus) 697 { 698 int i; 699 int cs; 700 701 mvebu_mbus_dram_info.mbus_dram_target_id = TARGET_DDR; 702 703 for (i = 0, cs = 0; i < 4; i++) { 704 u32 base = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i)); 705 u32 size = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i)); 706 707 /* 708 * We only take care of entries for which the chip 709 * select is enabled, and that don't have high base 710 * address bits set (devices can only access the first 711 * 32 bits of the memory). 712 */ 713 if ((size & DDR_SIZE_ENABLED) && 714 !(base & DDR_BASE_CS_HIGH_MASK)) { 715 struct mbus_dram_window *w; 716 717 w = &mvebu_mbus_dram_info.cs[cs++]; 718 w->cs_index = i; 719 w->mbus_attr = 0xf & ~(1 << i); 720 if (mbus->hw_io_coherency) 721 w->mbus_attr |= ATTR_HW_COHERENCY; 722 w->base = base & DDR_BASE_CS_LOW_MASK; 723 w->size = (u64)(size | ~DDR_SIZE_MASK) + 1; 724 } 725 } 726 mvebu_mbus_dram_info.num_cs = cs; 727 } 728 729 static int 730 mvebu_mbus_default_save_cpu_target(struct mvebu_mbus_state *mbus, 731 u32 __iomem *store_addr) 732 { 733 int i; 734 735 for (i = 0; i < 4; i++) { 736 u32 base = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i)); 737 u32 size = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i)); 738 739 writel(mbus->sdramwins_phys_base + DDR_BASE_CS_OFF(i), 740 store_addr++); 741 writel(base, store_addr++); 742 writel(mbus->sdramwins_phys_base + DDR_SIZE_CS_OFF(i), 743 store_addr++); 744 writel(size, store_addr++); 745 } 746 747 /* We've written 16 words to the store address */ 748 return 16; 749 } 750 751 static void __init 752 mvebu_mbus_dove_setup_cpu_target(struct mvebu_mbus_state *mbus) 753 { 754 int i; 755 int cs; 756 757 mvebu_mbus_dram_info.mbus_dram_target_id = TARGET_DDR; 758 759 for (i = 0, cs = 0; i < 2; i++) { 760 u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i)); 761 762 /* 763 * Chip select enabled? 764 */ 765 if (map & 1) { 766 struct mbus_dram_window *w; 767 768 w = &mvebu_mbus_dram_info.cs[cs++]; 769 w->cs_index = i; 770 w->mbus_attr = 0; /* CS address decoding done inside */ 771 /* the DDR controller, no need to */ 772 /* provide attributes */ 773 w->base = map & 0xff800000; 774 w->size = 0x100000 << (((map & 0x000f0000) >> 16) - 4); 775 } 776 } 777 778 mvebu_mbus_dram_info.num_cs = cs; 779 } 780 781 static int 782 mvebu_mbus_dove_save_cpu_target(struct mvebu_mbus_state *mbus, 783 u32 __iomem *store_addr) 784 { 785 int i; 786 787 for (i = 0; i < 2; i++) { 788 u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i)); 789 790 writel(mbus->sdramwins_phys_base + DOVE_DDR_BASE_CS_OFF(i), 791 store_addr++); 792 writel(map, store_addr++); 793 } 794 795 /* We've written 4 words to the store address */ 796 return 4; 797 } 798 799 int mvebu_mbus_save_cpu_target(u32 __iomem *store_addr) 800 { 801 return mbus_state.soc->save_cpu_target(&mbus_state, store_addr); 802 } 803 804 static const struct mvebu_mbus_soc_data armada_370_mbus_data = { 805 .num_wins = 20, 806 .has_mbus_bridge = true, 807 .win_cfg_offset = armada_370_xp_mbus_win_cfg_offset, 808 .win_remap_offset = generic_mbus_win_remap_8_offset, 809 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, 810 .show_cpu_target = mvebu_sdram_debug_show_orion, 811 .save_cpu_target = mvebu_mbus_default_save_cpu_target, 812 }; 813 814 static const struct mvebu_mbus_soc_data armada_xp_mbus_data = { 815 .num_wins = 20, 816 .has_mbus_bridge = true, 817 .win_cfg_offset = armada_370_xp_mbus_win_cfg_offset, 818 .win_remap_offset = armada_xp_mbus_win_remap_offset, 819 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, 820 .show_cpu_target = mvebu_sdram_debug_show_orion, 821 .save_cpu_target = mvebu_mbus_default_save_cpu_target, 822 }; 823 824 static const struct mvebu_mbus_soc_data kirkwood_mbus_data = { 825 .num_wins = 8, 826 .win_cfg_offset = generic_mbus_win_cfg_offset, 827 .save_cpu_target = mvebu_mbus_default_save_cpu_target, 828 .win_remap_offset = generic_mbus_win_remap_4_offset, 829 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, 830 .show_cpu_target = mvebu_sdram_debug_show_orion, 831 }; 832 833 static const struct mvebu_mbus_soc_data dove_mbus_data = { 834 .num_wins = 8, 835 .win_cfg_offset = generic_mbus_win_cfg_offset, 836 .save_cpu_target = mvebu_mbus_dove_save_cpu_target, 837 .win_remap_offset = generic_mbus_win_remap_4_offset, 838 .setup_cpu_target = mvebu_mbus_dove_setup_cpu_target, 839 .show_cpu_target = mvebu_sdram_debug_show_dove, 840 }; 841 842 /* 843 * Some variants of Orion5x have 4 remappable windows, some other have 844 * only two of them. 845 */ 846 static const struct mvebu_mbus_soc_data orion5x_4win_mbus_data = { 847 .num_wins = 8, 848 .win_cfg_offset = generic_mbus_win_cfg_offset, 849 .save_cpu_target = mvebu_mbus_default_save_cpu_target, 850 .win_remap_offset = generic_mbus_win_remap_4_offset, 851 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, 852 .show_cpu_target = mvebu_sdram_debug_show_orion, 853 }; 854 855 static const struct mvebu_mbus_soc_data orion5x_2win_mbus_data = { 856 .num_wins = 8, 857 .win_cfg_offset = generic_mbus_win_cfg_offset, 858 .save_cpu_target = mvebu_mbus_default_save_cpu_target, 859 .win_remap_offset = generic_mbus_win_remap_2_offset, 860 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, 861 .show_cpu_target = mvebu_sdram_debug_show_orion, 862 }; 863 864 static const struct mvebu_mbus_soc_data mv78xx0_mbus_data = { 865 .num_wins = 14, 866 .win_cfg_offset = mv78xx0_mbus_win_cfg_offset, 867 .save_cpu_target = mvebu_mbus_default_save_cpu_target, 868 .win_remap_offset = generic_mbus_win_remap_8_offset, 869 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, 870 .show_cpu_target = mvebu_sdram_debug_show_orion, 871 }; 872 873 static const struct of_device_id of_mvebu_mbus_ids[] = { 874 { .compatible = "marvell,armada370-mbus", 875 .data = &armada_370_mbus_data, }, 876 { .compatible = "marvell,armada375-mbus", 877 .data = &armada_xp_mbus_data, }, 878 { .compatible = "marvell,armada380-mbus", 879 .data = &armada_xp_mbus_data, }, 880 { .compatible = "marvell,armadaxp-mbus", 881 .data = &armada_xp_mbus_data, }, 882 { .compatible = "marvell,kirkwood-mbus", 883 .data = &kirkwood_mbus_data, }, 884 { .compatible = "marvell,dove-mbus", 885 .data = &dove_mbus_data, }, 886 { .compatible = "marvell,orion5x-88f5281-mbus", 887 .data = &orion5x_4win_mbus_data, }, 888 { .compatible = "marvell,orion5x-88f5182-mbus", 889 .data = &orion5x_2win_mbus_data, }, 890 { .compatible = "marvell,orion5x-88f5181-mbus", 891 .data = &orion5x_2win_mbus_data, }, 892 { .compatible = "marvell,orion5x-88f6183-mbus", 893 .data = &orion5x_4win_mbus_data, }, 894 { .compatible = "marvell,mv78xx0-mbus", 895 .data = &mv78xx0_mbus_data, }, 896 { }, 897 }; 898 899 /* 900 * Public API of the driver 901 */ 902 int mvebu_mbus_add_window_remap_by_id(unsigned int target, 903 unsigned int attribute, 904 phys_addr_t base, size_t size, 905 phys_addr_t remap) 906 { 907 struct mvebu_mbus_state *s = &mbus_state; 908 909 if (!mvebu_mbus_window_conflicts(s, base, size, target, attribute)) { 910 pr_err("cannot add window '%x:%x', conflicts with another window\n", 911 target, attribute); 912 return -EINVAL; 913 } 914 915 return mvebu_mbus_alloc_window(s, base, size, remap, target, attribute); 916 } 917 918 int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute, 919 phys_addr_t base, size_t size) 920 { 921 return mvebu_mbus_add_window_remap_by_id(target, attribute, base, 922 size, MVEBU_MBUS_NO_REMAP); 923 } 924 925 int mvebu_mbus_del_window(phys_addr_t base, size_t size) 926 { 927 int win; 928 929 win = mvebu_mbus_find_window(&mbus_state, base, size); 930 if (win < 0) 931 return win; 932 933 mvebu_mbus_disable_window(&mbus_state, win); 934 return 0; 935 } 936 937 void mvebu_mbus_get_pcie_mem_aperture(struct resource *res) 938 { 939 if (!res) 940 return; 941 *res = mbus_state.pcie_mem_aperture; 942 } 943 944 void mvebu_mbus_get_pcie_io_aperture(struct resource *res) 945 { 946 if (!res) 947 return; 948 *res = mbus_state.pcie_io_aperture; 949 } 950 951 int mvebu_mbus_get_dram_win_info(phys_addr_t phyaddr, u8 *target, u8 *attr) 952 { 953 const struct mbus_dram_target_info *dram; 954 int i; 955 956 /* Get dram info */ 957 dram = mv_mbus_dram_info(); 958 if (!dram) { 959 pr_err("missing DRAM information\n"); 960 return -ENODEV; 961 } 962 963 /* Try to find matching DRAM window for phyaddr */ 964 for (i = 0; i < dram->num_cs; i++) { 965 const struct mbus_dram_window *cs = dram->cs + i; 966 967 if (cs->base <= phyaddr && 968 phyaddr <= (cs->base + cs->size - 1)) { 969 *target = dram->mbus_dram_target_id; 970 *attr = cs->mbus_attr; 971 return 0; 972 } 973 } 974 975 pr_err("invalid dram address %pa\n", &phyaddr); 976 return -EINVAL; 977 } 978 EXPORT_SYMBOL_GPL(mvebu_mbus_get_dram_win_info); 979 980 int mvebu_mbus_get_io_win_info(phys_addr_t phyaddr, u32 *size, u8 *target, 981 u8 *attr) 982 { 983 int win; 984 985 for (win = 0; win < mbus_state.soc->num_wins; win++) { 986 u64 wbase; 987 int enabled; 988 989 mvebu_mbus_read_window(&mbus_state, win, &enabled, &wbase, 990 size, target, attr, NULL); 991 992 if (!enabled) 993 continue; 994 995 if (wbase <= phyaddr && phyaddr <= wbase + *size) 996 return win; 997 } 998 999 return -EINVAL; 1000 } 1001 EXPORT_SYMBOL_GPL(mvebu_mbus_get_io_win_info); 1002 1003 static __init int mvebu_mbus_debugfs_init(void) 1004 { 1005 struct mvebu_mbus_state *s = &mbus_state; 1006 1007 /* 1008 * If no base has been initialized, doesn't make sense to 1009 * register the debugfs entries. We may be on a multiplatform 1010 * kernel that isn't running a Marvell EBU SoC. 1011 */ 1012 if (!s->mbuswins_base) 1013 return 0; 1014 1015 s->debugfs_root = debugfs_create_dir("mvebu-mbus", NULL); 1016 if (s->debugfs_root) { 1017 s->debugfs_sdram = debugfs_create_file("sdram", S_IRUGO, 1018 s->debugfs_root, NULL, 1019 &mvebu_sdram_debug_fops); 1020 s->debugfs_devs = debugfs_create_file("devices", S_IRUGO, 1021 s->debugfs_root, NULL, 1022 &mvebu_devs_debug_fops); 1023 } 1024 1025 return 0; 1026 } 1027 fs_initcall(mvebu_mbus_debugfs_init); 1028 1029 static int mvebu_mbus_suspend(void) 1030 { 1031 struct mvebu_mbus_state *s = &mbus_state; 1032 int win; 1033 1034 if (!s->mbusbridge_base) 1035 return -ENODEV; 1036 1037 for (win = 0; win < s->soc->num_wins; win++) { 1038 void __iomem *addr = s->mbuswins_base + 1039 s->soc->win_cfg_offset(win); 1040 void __iomem *addr_rmp; 1041 1042 s->wins[win].base = readl(addr + WIN_BASE_OFF); 1043 s->wins[win].ctrl = readl(addr + WIN_CTRL_OFF); 1044 1045 if (!mvebu_mbus_window_is_remappable(s, win)) 1046 continue; 1047 1048 addr_rmp = s->mbuswins_base + 1049 s->soc->win_remap_offset(win); 1050 1051 s->wins[win].remap_lo = readl(addr_rmp + WIN_REMAP_LO_OFF); 1052 s->wins[win].remap_hi = readl(addr_rmp + WIN_REMAP_HI_OFF); 1053 } 1054 1055 s->mbus_bridge_ctrl = readl(s->mbusbridge_base + 1056 MBUS_BRIDGE_CTRL_OFF); 1057 s->mbus_bridge_base = readl(s->mbusbridge_base + 1058 MBUS_BRIDGE_BASE_OFF); 1059 1060 return 0; 1061 } 1062 1063 static void mvebu_mbus_resume(void) 1064 { 1065 struct mvebu_mbus_state *s = &mbus_state; 1066 int win; 1067 1068 writel(s->mbus_bridge_ctrl, 1069 s->mbusbridge_base + MBUS_BRIDGE_CTRL_OFF); 1070 writel(s->mbus_bridge_base, 1071 s->mbusbridge_base + MBUS_BRIDGE_BASE_OFF); 1072 1073 for (win = 0; win < s->soc->num_wins; win++) { 1074 void __iomem *addr = s->mbuswins_base + 1075 s->soc->win_cfg_offset(win); 1076 void __iomem *addr_rmp; 1077 1078 writel(s->wins[win].base, addr + WIN_BASE_OFF); 1079 writel(s->wins[win].ctrl, addr + WIN_CTRL_OFF); 1080 1081 if (!mvebu_mbus_window_is_remappable(s, win)) 1082 continue; 1083 1084 addr_rmp = s->mbuswins_base + 1085 s->soc->win_remap_offset(win); 1086 1087 writel(s->wins[win].remap_lo, addr_rmp + WIN_REMAP_LO_OFF); 1088 writel(s->wins[win].remap_hi, addr_rmp + WIN_REMAP_HI_OFF); 1089 } 1090 } 1091 1092 static struct syscore_ops mvebu_mbus_syscore_ops = { 1093 .suspend = mvebu_mbus_suspend, 1094 .resume = mvebu_mbus_resume, 1095 }; 1096 1097 static int __init mvebu_mbus_common_init(struct mvebu_mbus_state *mbus, 1098 phys_addr_t mbuswins_phys_base, 1099 size_t mbuswins_size, 1100 phys_addr_t sdramwins_phys_base, 1101 size_t sdramwins_size, 1102 phys_addr_t mbusbridge_phys_base, 1103 size_t mbusbridge_size, 1104 bool is_coherent) 1105 { 1106 int win; 1107 1108 mbus->mbuswins_base = ioremap(mbuswins_phys_base, mbuswins_size); 1109 if (!mbus->mbuswins_base) 1110 return -ENOMEM; 1111 1112 mbus->sdramwins_base = ioremap(sdramwins_phys_base, sdramwins_size); 1113 if (!mbus->sdramwins_base) { 1114 iounmap(mbus_state.mbuswins_base); 1115 return -ENOMEM; 1116 } 1117 1118 mbus->sdramwins_phys_base = sdramwins_phys_base; 1119 1120 if (mbusbridge_phys_base) { 1121 mbus->mbusbridge_base = ioremap(mbusbridge_phys_base, 1122 mbusbridge_size); 1123 if (!mbus->mbusbridge_base) { 1124 iounmap(mbus->sdramwins_base); 1125 iounmap(mbus->mbuswins_base); 1126 return -ENOMEM; 1127 } 1128 } else 1129 mbus->mbusbridge_base = NULL; 1130 1131 for (win = 0; win < mbus->soc->num_wins; win++) 1132 mvebu_mbus_disable_window(mbus, win); 1133 1134 mbus->soc->setup_cpu_target(mbus); 1135 mvebu_mbus_setup_cpu_target_nooverlap(mbus); 1136 1137 if (is_coherent) 1138 writel(UNIT_SYNC_BARRIER_ALL, 1139 mbus->mbuswins_base + UNIT_SYNC_BARRIER_OFF); 1140 1141 register_syscore_ops(&mvebu_mbus_syscore_ops); 1142 1143 return 0; 1144 } 1145 1146 int __init mvebu_mbus_init(const char *soc, phys_addr_t mbuswins_phys_base, 1147 size_t mbuswins_size, 1148 phys_addr_t sdramwins_phys_base, 1149 size_t sdramwins_size) 1150 { 1151 const struct of_device_id *of_id; 1152 1153 for (of_id = of_mvebu_mbus_ids; of_id->compatible[0]; of_id++) 1154 if (!strcmp(of_id->compatible, soc)) 1155 break; 1156 1157 if (!of_id->compatible[0]) { 1158 pr_err("could not find a matching SoC family\n"); 1159 return -ENODEV; 1160 } 1161 1162 mbus_state.soc = of_id->data; 1163 1164 return mvebu_mbus_common_init(&mbus_state, 1165 mbuswins_phys_base, 1166 mbuswins_size, 1167 sdramwins_phys_base, 1168 sdramwins_size, 0, 0, false); 1169 } 1170 1171 #ifdef CONFIG_OF 1172 /* 1173 * The window IDs in the ranges DT property have the following format: 1174 * - bits 28 to 31: MBus custom field 1175 * - bits 24 to 27: window target ID 1176 * - bits 16 to 23: window attribute ID 1177 * - bits 0 to 15: unused 1178 */ 1179 #define CUSTOM(id) (((id) & 0xF0000000) >> 24) 1180 #define TARGET(id) (((id) & 0x0F000000) >> 24) 1181 #define ATTR(id) (((id) & 0x00FF0000) >> 16) 1182 1183 static int __init mbus_dt_setup_win(struct mvebu_mbus_state *mbus, 1184 u32 base, u32 size, 1185 u8 target, u8 attr) 1186 { 1187 if (!mvebu_mbus_window_conflicts(mbus, base, size, target, attr)) { 1188 pr_err("cannot add window '%04x:%04x', conflicts with another window\n", 1189 target, attr); 1190 return -EBUSY; 1191 } 1192 1193 if (mvebu_mbus_alloc_window(mbus, base, size, MVEBU_MBUS_NO_REMAP, 1194 target, attr)) { 1195 pr_err("cannot add window '%04x:%04x', too many windows\n", 1196 target, attr); 1197 return -ENOMEM; 1198 } 1199 return 0; 1200 } 1201 1202 static int __init 1203 mbus_parse_ranges(struct device_node *node, 1204 int *addr_cells, int *c_addr_cells, int *c_size_cells, 1205 int *cell_count, const __be32 **ranges_start, 1206 const __be32 **ranges_end) 1207 { 1208 const __be32 *prop; 1209 int ranges_len, tuple_len; 1210 1211 /* Allow a node with no 'ranges' property */ 1212 *ranges_start = of_get_property(node, "ranges", &ranges_len); 1213 if (*ranges_start == NULL) { 1214 *addr_cells = *c_addr_cells = *c_size_cells = *cell_count = 0; 1215 *ranges_start = *ranges_end = NULL; 1216 return 0; 1217 } 1218 *ranges_end = *ranges_start + ranges_len / sizeof(__be32); 1219 1220 *addr_cells = of_n_addr_cells(node); 1221 1222 prop = of_get_property(node, "#address-cells", NULL); 1223 *c_addr_cells = be32_to_cpup(prop); 1224 1225 prop = of_get_property(node, "#size-cells", NULL); 1226 *c_size_cells = be32_to_cpup(prop); 1227 1228 *cell_count = *addr_cells + *c_addr_cells + *c_size_cells; 1229 tuple_len = (*cell_count) * sizeof(__be32); 1230 1231 if (ranges_len % tuple_len) { 1232 pr_warn("malformed ranges entry '%pOFn'\n", node); 1233 return -EINVAL; 1234 } 1235 return 0; 1236 } 1237 1238 static int __init mbus_dt_setup(struct mvebu_mbus_state *mbus, 1239 struct device_node *np) 1240 { 1241 int addr_cells, c_addr_cells, c_size_cells; 1242 int i, ret, cell_count; 1243 const __be32 *r, *ranges_start, *ranges_end; 1244 1245 ret = mbus_parse_ranges(np, &addr_cells, &c_addr_cells, 1246 &c_size_cells, &cell_count, 1247 &ranges_start, &ranges_end); 1248 if (ret < 0) 1249 return ret; 1250 1251 for (i = 0, r = ranges_start; r < ranges_end; r += cell_count, i++) { 1252 u32 windowid, base, size; 1253 u8 target, attr; 1254 1255 /* 1256 * An entry with a non-zero custom field do not 1257 * correspond to a static window, so skip it. 1258 */ 1259 windowid = of_read_number(r, 1); 1260 if (CUSTOM(windowid)) 1261 continue; 1262 1263 target = TARGET(windowid); 1264 attr = ATTR(windowid); 1265 1266 base = of_read_number(r + c_addr_cells, addr_cells); 1267 size = of_read_number(r + c_addr_cells + addr_cells, 1268 c_size_cells); 1269 ret = mbus_dt_setup_win(mbus, base, size, target, attr); 1270 if (ret < 0) 1271 return ret; 1272 } 1273 return 0; 1274 } 1275 1276 static void __init mvebu_mbus_get_pcie_resources(struct device_node *np, 1277 struct resource *mem, 1278 struct resource *io) 1279 { 1280 u32 reg[2]; 1281 int ret; 1282 1283 /* 1284 * These are optional, so we make sure that resource_size(x) will 1285 * return 0. 1286 */ 1287 memset(mem, 0, sizeof(struct resource)); 1288 mem->end = -1; 1289 memset(io, 0, sizeof(struct resource)); 1290 io->end = -1; 1291 1292 ret = of_property_read_u32_array(np, "pcie-mem-aperture", reg, ARRAY_SIZE(reg)); 1293 if (!ret) { 1294 mem->start = reg[0]; 1295 mem->end = mem->start + reg[1] - 1; 1296 mem->flags = IORESOURCE_MEM; 1297 } 1298 1299 ret = of_property_read_u32_array(np, "pcie-io-aperture", reg, ARRAY_SIZE(reg)); 1300 if (!ret) { 1301 io->start = reg[0]; 1302 io->end = io->start + reg[1] - 1; 1303 io->flags = IORESOURCE_IO; 1304 } 1305 } 1306 1307 int __init mvebu_mbus_dt_init(bool is_coherent) 1308 { 1309 struct resource mbuswins_res, sdramwins_res, mbusbridge_res; 1310 struct device_node *np, *controller; 1311 const struct of_device_id *of_id; 1312 const __be32 *prop; 1313 int ret; 1314 1315 np = of_find_matching_node_and_match(NULL, of_mvebu_mbus_ids, &of_id); 1316 if (!np) { 1317 pr_err("could not find a matching SoC family\n"); 1318 return -ENODEV; 1319 } 1320 1321 mbus_state.soc = of_id->data; 1322 1323 prop = of_get_property(np, "controller", NULL); 1324 if (!prop) { 1325 pr_err("required 'controller' property missing\n"); 1326 return -EINVAL; 1327 } 1328 1329 controller = of_find_node_by_phandle(be32_to_cpup(prop)); 1330 if (!controller) { 1331 pr_err("could not find an 'mbus-controller' node\n"); 1332 return -ENODEV; 1333 } 1334 1335 if (of_address_to_resource(controller, 0, &mbuswins_res)) { 1336 pr_err("cannot get MBUS register address\n"); 1337 return -EINVAL; 1338 } 1339 1340 if (of_address_to_resource(controller, 1, &sdramwins_res)) { 1341 pr_err("cannot get SDRAM register address\n"); 1342 return -EINVAL; 1343 } 1344 1345 /* 1346 * Set the resource to 0 so that it can be left unmapped by 1347 * mvebu_mbus_common_init() if the DT doesn't carry the 1348 * necessary information. This is needed to preserve backward 1349 * compatibility. 1350 */ 1351 memset(&mbusbridge_res, 0, sizeof(mbusbridge_res)); 1352 1353 if (mbus_state.soc->has_mbus_bridge) { 1354 if (of_address_to_resource(controller, 2, &mbusbridge_res)) 1355 pr_warn(FW_WARN "deprecated mbus-mvebu Device Tree, suspend/resume will not work\n"); 1356 } 1357 1358 mbus_state.hw_io_coherency = is_coherent; 1359 1360 /* Get optional pcie-{mem,io}-aperture properties */ 1361 mvebu_mbus_get_pcie_resources(np, &mbus_state.pcie_mem_aperture, 1362 &mbus_state.pcie_io_aperture); 1363 1364 ret = mvebu_mbus_common_init(&mbus_state, 1365 mbuswins_res.start, 1366 resource_size(&mbuswins_res), 1367 sdramwins_res.start, 1368 resource_size(&sdramwins_res), 1369 mbusbridge_res.start, 1370 resource_size(&mbusbridge_res), 1371 is_coherent); 1372 if (ret) 1373 return ret; 1374 1375 /* Setup statically declared windows in the DT */ 1376 return mbus_dt_setup(&mbus_state, np); 1377 } 1378 #endif 1379