arch/arm/mach-orion5x/common.c

   1 /*
   2  * arch/arm/mach-orion5x/common.c
   3  *
   4  * Core functions for Marvell Orion 5x SoCs
   5  *
   6  * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
   7  *
   8  * This file is licensed under the terms of the GNU General Public
   9  * License version 2.  This program is licensed "as is" without any
  10  * warranty of any kind, whether express or implied.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/serial_8250.h>
  17 #include <linux/mbus.h>
  18 #include <linux/mv643xx_eth.h>
  19 #include <linux/mv643xx_i2c.h>
  20 #include <linux/ata_platform.h>
  21 #include <linux/spi/orion_spi.h>
  22 #include <net/dsa.h>
  23 #include <asm/page.h>
  24 #include <asm/setup.h>
  25 #include <asm/timex.h>
  26 #include <asm/mach/arch.h>
  27 #include <asm/mach/map.h>
  28 #include <asm/mach/time.h>
  29 #include <mach/hardware.h>
  30 #include <mach/orion5x.h>
  31 #include <plat/ehci-orion.h>
  32 #include <plat/mv_xor.h>
  33 #include <plat/orion_nand.h>
  34 #include <plat/orion5x_wdt.h>
  35 #include <plat/time.h>
  36 #include "common.h"
  37
  38 /*****************************************************************************
  39  * I/O Address Mapping
  40  ****************************************************************************/
  41 static struct map_desc orion5x_io_desc[] __initdata = {
  42         {
  43                 .virtual        = ORION5X_REGS_VIRT_BASE,
  44                 .pfn            = __phys_to_pfn(ORION5X_REGS_PHYS_BASE),
  45                 .length         = ORION5X_REGS_SIZE,
  46                 .type           = MT_DEVICE,
  47         }, {
  48                 .virtual        = ORION5X_PCIE_IO_VIRT_BASE,
  49                 .pfn            = __phys_to_pfn(ORION5X_PCIE_IO_PHYS_BASE),
  50                 .length         = ORION5X_PCIE_IO_SIZE,
  51                 .type           = MT_DEVICE,
  52         }, {
  53                 .virtual        = ORION5X_PCI_IO_VIRT_BASE,
  54                 .pfn            = __phys_to_pfn(ORION5X_PCI_IO_PHYS_BASE),
  55                 .length         = ORION5X_PCI_IO_SIZE,
  56                 .type           = MT_DEVICE,
  57         }, {
  58                 .virtual        = ORION5X_PCIE_WA_VIRT_BASE,
  59                 .pfn            = __phys_to_pfn(ORION5X_PCIE_WA_PHYS_BASE),
  60                 .length         = ORION5X_PCIE_WA_SIZE,
  61                 .type           = MT_DEVICE,
  62         },
  63 };
  64
  65 void __init orion5x_map_io(void)
  66 {
  67         iotable_init(orion5x_io_desc, ARRAY_SIZE(orion5x_io_desc));
  68 }
  69
  70
  71 /*****************************************************************************
  72  * EHCI
  73  ****************************************************************************/
  74 static struct orion_ehci_data orion5x_ehci_data = {
  75         .dram           = &orion5x_mbus_dram_info,
  76         .phy_version    = EHCI_PHY_ORION,
  77 };
  78
  79 static u64 ehci_dmamask = 0xffffffffUL;
  80
  81
  82 /*****************************************************************************
  83  * EHCI0
  84  ****************************************************************************/
  85 static struct resource orion5x_ehci0_resources[] = {
  86         {
  87                 .start  = ORION5X_USB0_PHYS_BASE,
  88                 .end    = ORION5X_USB0_PHYS_BASE + SZ_4K - 1,
  89                 .flags  = IORESOURCE_MEM,
  90         }, {
  91                 .start  = IRQ_ORION5X_USB0_CTRL,
  92                 .end    = IRQ_ORION5X_USB0_CTRL,
  93                 .flags  = IORESOURCE_IRQ,
  94         },
  95 };
  96
  97 static struct platform_device orion5x_ehci0 = {
  98         .name           = "orion-ehci",
  99         .id             = 0,
 100         .dev            = {
 101                 .dma_mask               = &ehci_dmamask,
 102                 .coherent_dma_mask      = 0xffffffff,
 103                 .platform_data          = &orion5x_ehci_data,
 104         },
 105         .resource       = orion5x_ehci0_resources,
 106         .num_resources  = ARRAY_SIZE(orion5x_ehci0_resources),
 107 };
 108
 109 void __init orion5x_ehci0_init(void)
 110 {
 111         platform_device_register(&orion5x_ehci0);
 112 }
 113
 114
 115 /*****************************************************************************
 116  * EHCI1
 117  ****************************************************************************/
 118 static struct resource orion5x_ehci1_resources[] = {
 119         {
 120                 .start  = ORION5X_USB1_PHYS_BASE,
 121                 .end    = ORION5X_USB1_PHYS_BASE + SZ_4K - 1,
 122                 .flags  = IORESOURCE_MEM,
 123         }, {
 124                 .start  = IRQ_ORION5X_USB1_CTRL,
 125                 .end    = IRQ_ORION5X_USB1_CTRL,
 126                 .flags  = IORESOURCE_IRQ,
 127         },
 128 };
 129
 130 static struct platform_device orion5x_ehci1 = {
 131         .name           = "orion-ehci",
 132         .id             = 1,
 133         .dev            = {
 134                 .dma_mask               = &ehci_dmamask,
 135                 .coherent_dma_mask      = 0xffffffff,
 136                 .platform_data          = &orion5x_ehci_data,
 137         },
 138         .resource       = orion5x_ehci1_resources,
 139         .num_resources  = ARRAY_SIZE(orion5x_ehci1_resources),
 140 };
 141
 142 void __init orion5x_ehci1_init(void)
 143 {
 144         platform_device_register(&orion5x_ehci1);
 145 }
 146
 147
 148 /*****************************************************************************
 149  * GigE
 150  ****************************************************************************/
 151 struct mv643xx_eth_shared_platform_data orion5x_eth_shared_data = {
 152         .dram           = &orion5x_mbus_dram_info,
 153 };
 154
 155 static struct resource orion5x_eth_shared_resources[] = {
 156         {
 157                 .start  = ORION5X_ETH_PHYS_BASE + 0x2000,
 158                 .end    = ORION5X_ETH_PHYS_BASE + 0x3fff,
 159                 .flags  = IORESOURCE_MEM,
 160         }, {
 161                 .start  = IRQ_ORION5X_ETH_ERR,
 162                 .end    = IRQ_ORION5X_ETH_ERR,
 163                 .flags  = IORESOURCE_IRQ,
 164         },
 165 };
 166
 167 static struct platform_device orion5x_eth_shared = {
 168         .name           = MV643XX_ETH_SHARED_NAME,
 169         .id             = 0,
 170         .dev            = {
 171                 .platform_data  = &orion5x_eth_shared_data,
 172         },
 173         .num_resources  = ARRAY_SIZE(orion5x_eth_shared_resources),
 174         .resource       = orion5x_eth_shared_resources,
 175 };
 176
 177 static struct resource orion5x_eth_resources[] = {
 178         {
 179                 .name   = "eth irq",
 180                 .start  = IRQ_ORION5X_ETH_SUM,
 181                 .end    = IRQ_ORION5X_ETH_SUM,
 182                 .flags  = IORESOURCE_IRQ,
 183         },
 184 };
 185
 186 static struct platform_device orion5x_eth = {
 187         .name           = MV643XX_ETH_NAME,
 188         .id             = 0,
 189         .num_resources  = 1,
 190         .resource       = orion5x_eth_resources,
 191         .dev            = {
 192                 .coherent_dma_mask      = 0xffffffff,
 193         },
 194 };
 195
 196 void __init orion5x_eth_init(struct mv643xx_eth_platform_data *eth_data)
 197 {
 198         eth_data->shared = &orion5x_eth_shared;
 199         orion5x_eth.dev.platform_data = eth_data;
 200
 201         platform_device_register(&orion5x_eth_shared);
 202         platform_device_register(&orion5x_eth);
 203 }
 204
 205
 206 /*****************************************************************************
 207  * Ethernet switch
 208  ****************************************************************************/
 209 static struct resource orion5x_switch_resources[] = {
 210         {
 211                 .start  = 0,
 212                 .end    = 0,
 213                 .flags  = IORESOURCE_IRQ,
 214         },
 215 };
 216
 217 static struct platform_device orion5x_switch_device = {
 218         .name           = "dsa",
 219         .id             = 0,
 220         .num_resources  = 0,
 221         .resource       = orion5x_switch_resources,
 222 };
 223
 224 void __init orion5x_eth_switch_init(struct dsa_platform_data *d, int irq)
 225 {
 226         int i;
 227
 228         if (irq != NO_IRQ) {
 229                 orion5x_switch_resources[0].start = irq;
 230                 orion5x_switch_resources[0].end = irq;
 231                 orion5x_switch_device.num_resources = 1;
 232         }
 233
 234         d->netdev = &orion5x_eth.dev;
 235         for (i = 0; i < d->nr_chips; i++)
 236                 d->chip[i].mii_bus = &orion5x_eth_shared.dev;
 237         orion5x_switch_device.dev.platform_data = d;
 238
 239         platform_device_register(&orion5x_switch_device);
 240 }
 241
 242
 243 /*****************************************************************************
 244  * I2C
 245  ****************************************************************************/
 246 static struct mv64xxx_i2c_pdata orion5x_i2c_pdata = {
 247         .freq_m         = 8, /* assumes 166 MHz TCLK */
 248         .freq_n         = 3,
 249         .timeout        = 1000, /* Default timeout of 1 second */
 250 };
 251
 252 static struct resource orion5x_i2c_resources[] = {
 253         {
 254                 .start  = I2C_PHYS_BASE,
 255                 .end    = I2C_PHYS_BASE + 0x1f,
 256                 .flags  = IORESOURCE_MEM,
 257         }, {
 258                 .start  = IRQ_ORION5X_I2C,
 259                 .end    = IRQ_ORION5X_I2C,
 260                 .flags  = IORESOURCE_IRQ,
 261         },
 262 };
 263
 264 static struct platform_device orion5x_i2c = {
 265         .name           = MV64XXX_I2C_CTLR_NAME,
 266         .id             = 0,
 267         .num_resources  = ARRAY_SIZE(orion5x_i2c_resources),
 268         .resource       = orion5x_i2c_resources,
 269         .dev            = {
 270                 .platform_data  = &orion5x_i2c_pdata,
 271         },
 272 };
 273
 274 void __init orion5x_i2c_init(void)
 275 {
 276         platform_device_register(&orion5x_i2c);
 277 }
 278
 279
 280 /*****************************************************************************
 281  * SATA
 282  ****************************************************************************/
 283 static struct resource orion5x_sata_resources[] = {
 284         {
 285                 .name   = "sata base",
 286                 .start  = ORION5X_SATA_PHYS_BASE,
 287                 .end    = ORION5X_SATA_PHYS_BASE + 0x5000 - 1,
 288                 .flags  = IORESOURCE_MEM,
 289         }, {
 290                 .name   = "sata irq",
 291                 .start  = IRQ_ORION5X_SATA,
 292                 .end    = IRQ_ORION5X_SATA,
 293                 .flags  = IORESOURCE_IRQ,
 294         },
 295 };
 296
 297 static struct platform_device orion5x_sata = {
 298         .name           = "sata_mv",
 299         .id             = 0,
 300         .dev            = {
 301                 .coherent_dma_mask      = 0xffffffff,
 302         },
 303         .num_resources  = ARRAY_SIZE(orion5x_sata_resources),
 304         .resource       = orion5x_sata_resources,
 305 };
 306
 307 void __init orion5x_sata_init(struct mv_sata_platform_data *sata_data)
 308 {
 309         sata_data->dram = &orion5x_mbus_dram_info;
 310         orion5x_sata.dev.platform_data = sata_data;
 311         platform_device_register(&orion5x_sata);
 312 }
 313
 314
 315 /*****************************************************************************
 316  * SPI
 317  ****************************************************************************/
 318 static struct orion_spi_info orion5x_spi_plat_data = {
 319         .tclk                   = 0,
 320         .enable_clock_fix       = 1,
 321 };
 322
 323 static struct resource orion5x_spi_resources[] = {
 324         {
 325                 .name   = "spi base",
 326                 .start  = SPI_PHYS_BASE,
 327                 .end    = SPI_PHYS_BASE + 0x1f,
 328                 .flags  = IORESOURCE_MEM,
 329         },
 330 };
 331
 332 static struct platform_device orion5x_spi = {
 333         .name           = "orion_spi",
 334         .id             = 0,
 335         .dev            = {
 336                 .platform_data  = &orion5x_spi_plat_data,
 337         },
 338         .num_resources  = ARRAY_SIZE(orion5x_spi_resources),
 339         .resource       = orion5x_spi_resources,
 340 };
 341
 342 void __init orion5x_spi_init()
 343 {
 344         platform_device_register(&orion5x_spi);
 345 }
 346
 347
 348 /*****************************************************************************
 349  * UART0
 350  ****************************************************************************/
 351 static struct plat_serial8250_port orion5x_uart0_data[] = {
 352         {
 353                 .mapbase        = UART0_PHYS_BASE,
 354                 .membase        = (char *)UART0_VIRT_BASE,
 355                 .irq            = IRQ_ORION5X_UART0,
 356                 .flags          = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
 357                 .iotype         = UPIO_MEM,
 358                 .regshift       = 2,
 359                 .uartclk        = 0,
 360         }, {
 361         },
 362 };
 363
 364 static struct resource orion5x_uart0_resources[] = {
 365         {
 366                 .start          = UART0_PHYS_BASE,
 367                 .end            = UART0_PHYS_BASE + 0xff,
 368                 .flags          = IORESOURCE_MEM,
 369         }, {
 370                 .start          = IRQ_ORION5X_UART0,
 371                 .end            = IRQ_ORION5X_UART0,
 372                 .flags          = IORESOURCE_IRQ,
 373         },
 374 };
 375
 376 static struct platform_device orion5x_uart0 = {
 377         .name                   = "serial8250",
 378         .id                     = PLAT8250_DEV_PLATFORM,
 379         .dev                    = {
 380                 .platform_data  = orion5x_uart0_data,
 381         },
 382         .resource               = orion5x_uart0_resources,
 383         .num_resources          = ARRAY_SIZE(orion5x_uart0_resources),
 384 };
 385
 386 void __init orion5x_uart0_init(void)
 387 {
 388         platform_device_register(&orion5x_uart0);
 389 }
 390
 391
 392 /*****************************************************************************
 393  * UART1
 394  ****************************************************************************/
 395 static struct plat_serial8250_port orion5x_uart1_data[] = {
 396         {
 397                 .mapbase        = UART1_PHYS_BASE,
 398                 .membase        = (char *)UART1_VIRT_BASE,
 399                 .irq            = IRQ_ORION5X_UART1,
 400                 .flags          = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
 401                 .iotype         = UPIO_MEM,
 402                 .regshift       = 2,
 403                 .uartclk        = 0,
 404         }, {
 405         },
 406 };
 407
 408 static struct resource orion5x_uart1_resources[] = {
 409         {
 410                 .start          = UART1_PHYS_BASE,
 411                 .end            = UART1_PHYS_BASE + 0xff,
 412                 .flags          = IORESOURCE_MEM,
 413         }, {
 414                 .start          = IRQ_ORION5X_UART1,
 415                 .end            = IRQ_ORION5X_UART1,
 416                 .flags          = IORESOURCE_IRQ,
 417         },
 418 };
 419
 420 static struct platform_device orion5x_uart1 = {
 421         .name                   = "serial8250",
 422         .id                     = PLAT8250_DEV_PLATFORM1,
 423         .dev                    = {
 424                 .platform_data  = orion5x_uart1_data,
 425         },
 426         .resource               = orion5x_uart1_resources,
 427         .num_resources          = ARRAY_SIZE(orion5x_uart1_resources),
 428 };
 429
 430 void __init orion5x_uart1_init(void)
 431 {
 432         platform_device_register(&orion5x_uart1);
 433 }
 434
 435
 436 /*****************************************************************************
 437  * XOR engine
 438  ****************************************************************************/
 439 struct mv_xor_platform_shared_data orion5x_xor_shared_data = {
 440         .dram           = &orion5x_mbus_dram_info,
 441 };
 442
 443 static struct resource orion5x_xor_shared_resources[] = {
 444         {
 445                 .name   = "xor low",
 446                 .start  = ORION5X_XOR_PHYS_BASE,
 447                 .end    = ORION5X_XOR_PHYS_BASE + 0xff,
 448                 .flags  = IORESOURCE_MEM,
 449         }, {
 450                 .name   = "xor high",
 451                 .start  = ORION5X_XOR_PHYS_BASE + 0x200,
 452                 .end    = ORION5X_XOR_PHYS_BASE + 0x2ff,
 453                 .flags  = IORESOURCE_MEM,
 454         },
 455 };
 456
 457 static struct platform_device orion5x_xor_shared = {
 458         .name           = MV_XOR_SHARED_NAME,
 459         .id             = 0,
 460         .dev            = {
 461                 .platform_data  = &orion5x_xor_shared_data,
 462         },
 463         .num_resources  = ARRAY_SIZE(orion5x_xor_shared_resources),
 464         .resource       = orion5x_xor_shared_resources,
 465 };
 466
 467 static u64 orion5x_xor_dmamask = DMA_BIT_MASK(32);
 468
 469 static struct resource orion5x_xor0_resources[] = {
 470         [0] = {
 471                 .start  = IRQ_ORION5X_XOR0,
 472                 .end    = IRQ_ORION5X_XOR0,
 473                 .flags  = IORESOURCE_IRQ,
 474         },
 475 };
 476
 477 static struct mv_xor_platform_data orion5x_xor0_data = {
 478         .shared         = &orion5x_xor_shared,
 479         .hw_id          = 0,
 480         .pool_size      = PAGE_SIZE,
 481 };
 482
 483 static struct platform_device orion5x_xor0_channel = {
 484         .name           = MV_XOR_NAME,
 485         .id             = 0,
 486         .num_resources  = ARRAY_SIZE(orion5x_xor0_resources),
 487         .resource       = orion5x_xor0_resources,
 488         .dev            = {
 489                 .dma_mask               = &orion5x_xor_dmamask,
 490                 .coherent_dma_mask      = DMA_BIT_MASK(64),
 491                 .platform_data          = (void *)&orion5x_xor0_data,
 492         },
 493 };
 494
 495 static struct resource orion5x_xor1_resources[] = {
 496         [0] = {
 497                 .start  = IRQ_ORION5X_XOR1,
 498                 .end    = IRQ_ORION5X_XOR1,
 499                 .flags  = IORESOURCE_IRQ,
 500         },
 501 };
 502
 503 static struct mv_xor_platform_data orion5x_xor1_data = {
 504         .shared         = &orion5x_xor_shared,
 505         .hw_id          = 1,
 506         .pool_size      = PAGE_SIZE,
 507 };
 508
 509 static struct platform_device orion5x_xor1_channel = {
 510         .name           = MV_XOR_NAME,
 511         .id             = 1,
 512         .num_resources  = ARRAY_SIZE(orion5x_xor1_resources),
 513         .resource       = orion5x_xor1_resources,
 514         .dev            = {
 515                 .dma_mask               = &orion5x_xor_dmamask,
 516                 .coherent_dma_mask      = DMA_BIT_MASK(64),
 517                 .platform_data          = (void *)&orion5x_xor1_data,
 518         },
 519 };
 520
 521 void __init orion5x_xor_init(void)
 522 {
 523         platform_device_register(&orion5x_xor_shared);
 524
 525         /*
 526          * two engines can't do memset simultaneously, this limitation
 527          * satisfied by removing memset support from one of the engines.
 528          */
 529         dma_cap_set(DMA_MEMCPY, orion5x_xor0_data.cap_mask);
 530         dma_cap_set(DMA_XOR, orion5x_xor0_data.cap_mask);
 531         platform_device_register(&orion5x_xor0_channel);
 532
 533         dma_cap_set(DMA_MEMCPY, orion5x_xor1_data.cap_mask);
 534         dma_cap_set(DMA_MEMSET, orion5x_xor1_data.cap_mask);
 535         dma_cap_set(DMA_XOR, orion5x_xor1_data.cap_mask);
 536         platform_device_register(&orion5x_xor1_channel);
 537 }
 538
 539
 540 /*****************************************************************************
 541  * Watchdog
 542  ****************************************************************************/
 543 static struct orion5x_wdt_platform_data orion5x_wdt_data = {
 544         .tclk                   = 0,
 545 };
 546
 547 static struct platform_device orion5x_wdt_device = {
 548         .name           = "orion5x_wdt",
 549         .id             = -1,
 550         .dev            = {
 551                 .platform_data  = &orion5x_wdt_data,
 552         },
 553         .num_resources  = 0,
 554 };
 555
 556 void __init orion5x_wdt_init(void)
 557 {
 558         orion5x_wdt_data.tclk = orion5x_tclk;
 559         platform_device_register(&orion5x_wdt_device);
 560 }
 561
 562
 563 /*****************************************************************************
 564  * Time handling
 565  ****************************************************************************/
 566 int orion5x_tclk;
 567
 568 int __init orion5x_find_tclk(void)
 569 {
 570         u32 dev, rev;
 571
 572         orion5x_pcie_id(&dev, &rev);
 573         if (dev == MV88F6183_DEV_ID &&
 574             (readl(MPP_RESET_SAMPLE) & 0x00000200) == 0)
 575                 return 133333333;
 576
 577         return 166666667;
 578 }
 579
 580 static void orion5x_timer_init(void)
 581 {
 582         orion5x_tclk = orion5x_find_tclk();
 583         orion_time_init(IRQ_ORION5X_BRIDGE, orion5x_tclk);
 584 }
 585
 586 struct sys_timer orion5x_timer = {
 587         .init = orion5x_timer_init,
 588 };
 589
 590
 591 /*****************************************************************************
 592  * General
 593  ****************************************************************************/
 594 /*
 595  * Identify device ID and rev from PCIe configuration header space '0'.
 596  */
 597 static void __init orion5x_id(u32 *dev, u32 *rev, char **dev_name)
 598 {
 599         orion5x_pcie_id(dev, rev);
 600
 601         if (*dev == MV88F5281_DEV_ID) {
 602                 if (*rev == MV88F5281_REV_D2) {
 603                         *dev_name = "MV88F5281-D2";
 604                 } else if (*rev == MV88F5281_REV_D1) {
 605                         *dev_name = "MV88F5281-D1";
 606                 } else if (*rev == MV88F5281_REV_D0) {
 607                         *dev_name = "MV88F5281-D0";
 608                 } else {
 609                         *dev_name = "MV88F5281-Rev-Unsupported";
 610                 }
 611         } else if (*dev == MV88F5182_DEV_ID) {
 612                 if (*rev == MV88F5182_REV_A2) {
 613                         *dev_name = "MV88F5182-A2";
 614                 } else {
 615                         *dev_name = "MV88F5182-Rev-Unsupported";
 616                 }
 617         } else if (*dev == MV88F5181_DEV_ID) {
 618                 if (*rev == MV88F5181_REV_B1) {
 619                         *dev_name = "MV88F5181-Rev-B1";
 620                 } else if (*rev == MV88F5181L_REV_A1) {
 621                         *dev_name = "MV88F5181L-Rev-A1";
 622                 } else {
 623                         *dev_name = "MV88F5181(L)-Rev-Unsupported";
 624                 }
 625         } else if (*dev == MV88F6183_DEV_ID) {
 626                 if (*rev == MV88F6183_REV_B0) {
 627                         *dev_name = "MV88F6183-Rev-B0";
 628                 } else {
 629                         *dev_name = "MV88F6183-Rev-Unsupported";
 630                 }
 631         } else {
 632                 *dev_name = "Device-Unknown";
 633         }
 634 }
 635
 636 void __init orion5x_init(void)
 637 {
 638         char *dev_name;
 639         u32 dev, rev;
 640
 641         orion5x_id(&dev, &rev, &dev_name);
 642         printk(KERN_INFO "Orion ID: %s. TCLK=%d.\n", dev_name, orion5x_tclk);
 643
 644         orion5x_eth_shared_data.t_clk = orion5x_tclk;
 645         orion5x_spi_plat_data.tclk = orion5x_tclk;
 646         orion5x_uart0_data[0].uartclk = orion5x_tclk;
 647         orion5x_uart1_data[0].uartclk = orion5x_tclk;
 648
 649         /*
 650          * Setup Orion address map
 651          */
 652         orion5x_setup_cpu_mbus_bridge();
 653
 654         /*
 655          * Don't issue "Wait for Interrupt" instruction if we are
 656          * running on D0 5281 silicon.
 657          */
 658         if (dev == MV88F5281_DEV_ID && rev == MV88F5281_REV_D0) {
 659                 printk(KERN_INFO "Orion: Applying 5281 D0 WFI workaround.\n");
 660                 disable_hlt();
 661         }
 662
 663         /*
 664          * Register watchdog driver
 665          */
 666         orion5x_wdt_init();
 667 }
 668
 669 /*
 670  * Many orion-based systems have buggy bootloader implementations.
 671  * This is a common fixup for bogus memory tags.
 672  */
 673 void __init tag_fixup_mem32(struct machine_desc *mdesc, struct tag *t,
 674                             char **from, struct meminfo *meminfo)
 675 {
 676         for (; t->hdr.size; t = tag_next(t))
 677                 if (t->hdr.tag == ATAG_MEM &&
 678                     (!t->u.mem.size || t->u.mem.size & ~PAGE_MASK ||
 679                      t->u.mem.start & ~PAGE_MASK)) {
 680                         printk(KERN_WARNING
 681                                "Clearing invalid memory bank %dKB@0x%08x\n",
 682                                t->u.mem.size / 1024, t->u.mem.start);
 683                         t->hdr.tag = 0;
 684                 }
 685 }