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 };
 192
 193 void __init orion5x_eth_init(struct mv643xx_eth_platform_data *eth_data)
 194 {
 195         eth_data->shared = &orion5x_eth_shared;
 196         orion5x_eth.dev.platform_data = eth_data;
 197
 198         platform_device_register(&orion5x_eth_shared);
 199         platform_device_register(&orion5x_eth);
 200 }
 201
 202
 203 /*****************************************************************************
 204  * Ethernet switch
 205  ****************************************************************************/
 206 static struct resource orion5x_switch_resources[] = {
 207         {
 208                 .start  = 0,
 209                 .end    = 0,
 210                 .flags  = IORESOURCE_IRQ,
 211         },
 212 };
 213
 214 static struct platform_device orion5x_switch_device = {
 215         .name           = "dsa",
 216         .id             = 0,
 217         .num_resources  = 0,
 218         .resource       = orion5x_switch_resources,
 219 };
 220
 221 void __init orion5x_eth_switch_init(struct dsa_platform_data *d, int irq)
 222 {
 223         int i;
 224
 225         if (irq != NO_IRQ) {
 226                 orion5x_switch_resources[0].start = irq;
 227                 orion5x_switch_resources[0].end = irq;
 228                 orion5x_switch_device.num_resources = 1;
 229         }
 230
 231         d->netdev = &orion5x_eth.dev;
 232         for (i = 0; i < d->nr_chips; i++)
 233                 d->chip[i].mii_bus = &orion5x_eth_shared.dev;
 234         orion5x_switch_device.dev.platform_data = d;
 235
 236         platform_device_register(&orion5x_switch_device);
 237 }
 238
 239
 240 /*****************************************************************************
 241  * I2C
 242  ****************************************************************************/
 243 static struct mv64xxx_i2c_pdata orion5x_i2c_pdata = {
 244         .freq_m         = 8, /* assumes 166 MHz TCLK */
 245         .freq_n         = 3,
 246         .timeout        = 1000, /* Default timeout of 1 second */
 247 };
 248
 249 static struct resource orion5x_i2c_resources[] = {
 250         {
 251                 .name   = "i2c base",
 252                 .start  = I2C_PHYS_BASE,
 253                 .end    = I2C_PHYS_BASE + 0x1f,
 254                 .flags  = IORESOURCE_MEM,
 255         }, {
 256                 .name   = "i2c irq",
 257                 .start  = IRQ_ORION5X_I2C,
 258                 .end    = IRQ_ORION5X_I2C,
 259                 .flags  = IORESOURCE_IRQ,
 260         },
 261 };
 262
 263 static struct platform_device orion5x_i2c = {
 264         .name           = MV64XXX_I2C_CTLR_NAME,
 265         .id             = 0,
 266         .num_resources  = ARRAY_SIZE(orion5x_i2c_resources),
 267         .resource       = orion5x_i2c_resources,
 268         .dev            = {
 269                 .platform_data  = &orion5x_i2c_pdata,
 270         },
 271 };
 272
 273 void __init orion5x_i2c_init(void)
 274 {
 275         platform_device_register(&orion5x_i2c);
 276 }
 277
 278
 279 /*****************************************************************************
 280  * SATA
 281  ****************************************************************************/
 282 static struct resource orion5x_sata_resources[] = {
 283         {
 284                 .name   = "sata base",
 285                 .start  = ORION5X_SATA_PHYS_BASE,
 286                 .end    = ORION5X_SATA_PHYS_BASE + 0x5000 - 1,
 287                 .flags  = IORESOURCE_MEM,
 288         }, {
 289                 .name   = "sata irq",
 290                 .start  = IRQ_ORION5X_SATA,
 291                 .end    = IRQ_ORION5X_SATA,
 292                 .flags  = IORESOURCE_IRQ,
 293         },
 294 };
 295
 296 static struct platform_device orion5x_sata = {
 297         .name           = "sata_mv",
 298         .id             = 0,
 299         .dev            = {
 300                 .coherent_dma_mask      = 0xffffffff,
 301         },
 302         .num_resources  = ARRAY_SIZE(orion5x_sata_resources),
 303         .resource       = orion5x_sata_resources,
 304 };
 305
 306 void __init orion5x_sata_init(struct mv_sata_platform_data *sata_data)
 307 {
 308         sata_data->dram = &orion5x_mbus_dram_info;
 309         orion5x_sata.dev.platform_data = sata_data;
 310         platform_device_register(&orion5x_sata);
 311 }
 312
 313
 314 /*****************************************************************************
 315  * SPI
 316  ****************************************************************************/
 317 static struct orion_spi_info orion5x_spi_plat_data = {
 318         .tclk                   = 0,
 319         .enable_clock_fix       = 1,
 320 };
 321
 322 static struct resource orion5x_spi_resources[] = {
 323         {
 324                 .name   = "spi base",
 325                 .start  = SPI_PHYS_BASE,
 326                 .end    = SPI_PHYS_BASE + 0x1f,
 327                 .flags  = IORESOURCE_MEM,
 328         },
 329 };
 330
 331 static struct platform_device orion5x_spi = {
 332         .name           = "orion_spi",
 333         .id             = 0,
 334         .dev            = {
 335                 .platform_data  = &orion5x_spi_plat_data,
 336         },
 337         .num_resources  = ARRAY_SIZE(orion5x_spi_resources),
 338         .resource       = orion5x_spi_resources,
 339 };
 340
 341 void __init orion5x_spi_init()
 342 {
 343         platform_device_register(&orion5x_spi);
 344 }
 345
 346
 347 /*****************************************************************************
 348  * UART0
 349  ****************************************************************************/
 350 static struct plat_serial8250_port orion5x_uart0_data[] = {
 351         {
 352                 .mapbase        = UART0_PHYS_BASE,
 353                 .membase        = (char *)UART0_VIRT_BASE,
 354                 .irq            = IRQ_ORION5X_UART0,
 355                 .flags          = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
 356                 .iotype         = UPIO_MEM,
 357                 .regshift       = 2,
 358                 .uartclk        = 0,
 359         }, {
 360         },
 361 };
 362
 363 static struct resource orion5x_uart0_resources[] = {
 364         {
 365                 .start          = UART0_PHYS_BASE,
 366                 .end            = UART0_PHYS_BASE + 0xff,
 367                 .flags          = IORESOURCE_MEM,
 368         }, {
 369                 .start          = IRQ_ORION5X_UART0,
 370                 .end            = IRQ_ORION5X_UART0,
 371                 .flags          = IORESOURCE_IRQ,
 372         },
 373 };
 374
 375 static struct platform_device orion5x_uart0 = {
 376         .name                   = "serial8250",
 377         .id                     = PLAT8250_DEV_PLATFORM,
 378         .dev                    = {
 379                 .platform_data  = orion5x_uart0_data,
 380         },
 381         .resource               = orion5x_uart0_resources,
 382         .num_resources          = ARRAY_SIZE(orion5x_uart0_resources),
 383 };
 384
 385 void __init orion5x_uart0_init(void)
 386 {
 387         platform_device_register(&orion5x_uart0);
 388 }
 389
 390
 391 /*****************************************************************************
 392  * UART1
 393  ****************************************************************************/
 394 static struct plat_serial8250_port orion5x_uart1_data[] = {
 395         {
 396                 .mapbase        = UART1_PHYS_BASE,
 397                 .membase        = (char *)UART1_VIRT_BASE,
 398                 .irq            = IRQ_ORION5X_UART1,
 399                 .flags          = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
 400                 .iotype         = UPIO_MEM,
 401                 .regshift       = 2,
 402                 .uartclk        = 0,
 403         }, {
 404         },
 405 };
 406
 407 static struct resource orion5x_uart1_resources[] = {
 408         {
 409                 .start          = UART1_PHYS_BASE,
 410                 .end            = UART1_PHYS_BASE + 0xff,
 411                 .flags          = IORESOURCE_MEM,
 412         }, {
 413                 .start          = IRQ_ORION5X_UART1,
 414                 .end            = IRQ_ORION5X_UART1,
 415                 .flags          = IORESOURCE_IRQ,
 416         },
 417 };
 418
 419 static struct platform_device orion5x_uart1 = {
 420         .name                   = "serial8250",
 421         .id                     = PLAT8250_DEV_PLATFORM1,
 422         .dev                    = {
 423                 .platform_data  = orion5x_uart1_data,
 424         },
 425         .resource               = orion5x_uart1_resources,
 426         .num_resources          = ARRAY_SIZE(orion5x_uart1_resources),
 427 };
 428
 429 void __init orion5x_uart1_init(void)
 430 {
 431         platform_device_register(&orion5x_uart1);
 432 }
 433
 434
 435 /*****************************************************************************
 436  * XOR engine
 437  ****************************************************************************/
 438 struct mv_xor_platform_shared_data orion5x_xor_shared_data = {
 439         .dram           = &orion5x_mbus_dram_info,
 440 };
 441
 442 static struct resource orion5x_xor_shared_resources[] = {
 443         {
 444                 .name   = "xor low",
 445                 .start  = ORION5X_XOR_PHYS_BASE,
 446                 .end    = ORION5X_XOR_PHYS_BASE + 0xff,
 447                 .flags  = IORESOURCE_MEM,
 448         }, {
 449                 .name   = "xor high",
 450                 .start  = ORION5X_XOR_PHYS_BASE + 0x200,
 451                 .end    = ORION5X_XOR_PHYS_BASE + 0x2ff,
 452                 .flags  = IORESOURCE_MEM,
 453         },
 454 };
 455
 456 static struct platform_device orion5x_xor_shared = {
 457         .name           = MV_XOR_SHARED_NAME,
 458         .id             = 0,
 459         .dev            = {
 460                 .platform_data  = &orion5x_xor_shared_data,
 461         },
 462         .num_resources  = ARRAY_SIZE(orion5x_xor_shared_resources),
 463         .resource       = orion5x_xor_shared_resources,
 464 };
 465
 466 static u64 orion5x_xor_dmamask = DMA_32BIT_MASK;
 467
 468 static struct resource orion5x_xor0_resources[] = {
 469         [0] = {
 470                 .start  = IRQ_ORION5X_XOR0,
 471                 .end    = IRQ_ORION5X_XOR0,
 472                 .flags  = IORESOURCE_IRQ,
 473         },
 474 };
 475
 476 static struct mv_xor_platform_data orion5x_xor0_data = {
 477         .shared         = &orion5x_xor_shared,
 478         .hw_id          = 0,
 479         .pool_size      = PAGE_SIZE,
 480 };
 481
 482 static struct platform_device orion5x_xor0_channel = {
 483         .name           = MV_XOR_NAME,
 484         .id             = 0,
 485         .num_resources  = ARRAY_SIZE(orion5x_xor0_resources),
 486         .resource       = orion5x_xor0_resources,
 487         .dev            = {
 488                 .dma_mask               = &orion5x_xor_dmamask,
 489                 .coherent_dma_mask      = DMA_64BIT_MASK,
 490                 .platform_data          = (void *)&orion5x_xor0_data,
 491         },
 492 };
 493
 494 static struct resource orion5x_xor1_resources[] = {
 495         [0] = {
 496                 .start  = IRQ_ORION5X_XOR1,
 497                 .end    = IRQ_ORION5X_XOR1,
 498                 .flags  = IORESOURCE_IRQ,
 499         },
 500 };
 501
 502 static struct mv_xor_platform_data orion5x_xor1_data = {
 503         .shared         = &orion5x_xor_shared,
 504         .hw_id          = 1,
 505         .pool_size      = PAGE_SIZE,
 506 };
 507
 508 static struct platform_device orion5x_xor1_channel = {
 509         .name           = MV_XOR_NAME,
 510         .id             = 1,
 511         .num_resources  = ARRAY_SIZE(orion5x_xor1_resources),
 512         .resource       = orion5x_xor1_resources,
 513         .dev            = {
 514                 .dma_mask               = &orion5x_xor_dmamask,
 515                 .coherent_dma_mask      = DMA_64BIT_MASK,
 516                 .platform_data          = (void *)&orion5x_xor1_data,
 517         },
 518 };
 519
 520 void __init orion5x_xor_init(void)
 521 {
 522         platform_device_register(&orion5x_xor_shared);
 523
 524         /*
 525          * two engines can't do memset simultaneously, this limitation
 526          * satisfied by removing memset support from one of the engines.
 527          */
 528         dma_cap_set(DMA_MEMCPY, orion5x_xor0_data.cap_mask);
 529         dma_cap_set(DMA_XOR, orion5x_xor0_data.cap_mask);
 530         platform_device_register(&orion5x_xor0_channel);
 531
 532         dma_cap_set(DMA_MEMCPY, orion5x_xor1_data.cap_mask);
 533         dma_cap_set(DMA_MEMSET, orion5x_xor1_data.cap_mask);
 534         dma_cap_set(DMA_XOR, orion5x_xor1_data.cap_mask);
 535         platform_device_register(&orion5x_xor1_channel);
 536 }
 537
 538
 539 /*****************************************************************************
 540  * Watchdog
 541  ****************************************************************************/
 542 static struct orion5x_wdt_platform_data orion5x_wdt_data = {
 543         .tclk                   = 0,
 544 };
 545
 546 static struct platform_device orion5x_wdt_device = {
 547         .name           = "orion5x_wdt",
 548         .id             = -1,
 549         .dev            = {
 550                 .platform_data  = &orion5x_wdt_data,
 551         },
 552         .num_resources  = 0,
 553 };
 554
 555 void __init orion5x_wdt_init(void)
 556 {
 557         orion5x_wdt_data.tclk = orion5x_tclk;
 558         platform_device_register(&orion5x_wdt_device);
 559 }
 560
 561
 562 /*****************************************************************************
 563  * Time handling
 564  ****************************************************************************/
 565 int orion5x_tclk;
 566
 567 int __init orion5x_find_tclk(void)
 568 {
 569         u32 dev, rev;
 570
 571         orion5x_pcie_id(&dev, &rev);
 572         if (dev == MV88F6183_DEV_ID &&
 573             (readl(MPP_RESET_SAMPLE) & 0x00000200) == 0)
 574                 return 133333333;
 575
 576         return 166666667;
 577 }
 578
 579 static void orion5x_timer_init(void)
 580 {
 581         orion5x_tclk = orion5x_find_tclk();
 582         orion_time_init(IRQ_ORION5X_BRIDGE, orion5x_tclk);
 583 }
 584
 585 struct sys_timer orion5x_timer = {
 586         .init = orion5x_timer_init,
 587 };
 588
 589
 590 /*****************************************************************************
 591  * General
 592  ****************************************************************************/
 593 /*
 594  * Identify device ID and rev from PCIe configuration header space '0'.
 595  */
 596 static void __init orion5x_id(u32 *dev, u32 *rev, char **dev_name)
 597 {
 598         orion5x_pcie_id(dev, rev);
 599
 600         if (*dev == MV88F5281_DEV_ID) {
 601                 if (*rev == MV88F5281_REV_D2) {
 602                         *dev_name = "MV88F5281-D2";
 603                 } else if (*rev == MV88F5281_REV_D1) {
 604                         *dev_name = "MV88F5281-D1";
 605                 } else if (*rev == MV88F5281_REV_D0) {
 606                         *dev_name = "MV88F5281-D0";
 607                 } else {
 608                         *dev_name = "MV88F5281-Rev-Unsupported";
 609                 }
 610         } else if (*dev == MV88F5182_DEV_ID) {
 611                 if (*rev == MV88F5182_REV_A2) {
 612                         *dev_name = "MV88F5182-A2";
 613                 } else {
 614                         *dev_name = "MV88F5182-Rev-Unsupported";
 615                 }
 616         } else if (*dev == MV88F5181_DEV_ID) {
 617                 if (*rev == MV88F5181_REV_B1) {
 618                         *dev_name = "MV88F5181-Rev-B1";
 619                 } else if (*rev == MV88F5181L_REV_A1) {
 620                         *dev_name = "MV88F5181L-Rev-A1";
 621                 } else {
 622                         *dev_name = "MV88F5181(L)-Rev-Unsupported";
 623                 }
 624         } else if (*dev == MV88F6183_DEV_ID) {
 625                 if (*rev == MV88F6183_REV_B0) {
 626                         *dev_name = "MV88F6183-Rev-B0";
 627                 } else {
 628                         *dev_name = "MV88F6183-Rev-Unsupported";
 629                 }
 630         } else {
 631                 *dev_name = "Device-Unknown";
 632         }
 633 }
 634
 635 void __init orion5x_init(void)
 636 {
 637         char *dev_name;
 638         u32 dev, rev;
 639
 640         orion5x_id(&dev, &rev, &dev_name);
 641         printk(KERN_INFO "Orion ID: %s. TCLK=%d.\n", dev_name, orion5x_tclk);
 642
 643         orion5x_eth_shared_data.t_clk = orion5x_tclk;
 644         orion5x_spi_plat_data.tclk = orion5x_tclk;
 645         orion5x_uart0_data[0].uartclk = orion5x_tclk;
 646         orion5x_uart1_data[0].uartclk = orion5x_tclk;
 647
 648         /*
 649          * Setup Orion address map
 650          */
 651         orion5x_setup_cpu_mbus_bridge();
 652
 653         /*
 654          * Don't issue "Wait for Interrupt" instruction if we are
 655          * running on D0 5281 silicon.
 656          */
 657         if (dev == MV88F5281_DEV_ID && rev == MV88F5281_REV_D0) {
 658                 printk(KERN_INFO "Orion: Applying 5281 D0 WFI workaround.\n");
 659                 disable_hlt();
 660         }
 661
 662         /*
 663          * Register watchdog driver
 664          */
 665         orion5x_wdt_init();
 666 }
 667
 668 /*
 669  * Many orion-based systems have buggy bootloader implementations.
 670  * This is a common fixup for bogus memory tags.
 671  */
 672 void __init tag_fixup_mem32(struct machine_desc *mdesc, struct tag *t,
 673                             char **from, struct meminfo *meminfo)
 674 {
 675         for (; t->hdr.size; t = tag_next(t))
 676                 if (t->hdr.tag == ATAG_MEM &&
 677                     (!t->u.mem.size || t->u.mem.size & ~PAGE_MASK ||
 678                      t->u.mem.start & ~PAGE_MASK)) {
 679                         printk(KERN_WARNING
 680                                "Clearing invalid memory bank %dKB@0x%08x\n",
 681                                t->u.mem.size / 1024, t->u.mem.start);
 682                         t->hdr.tag = 0;
 683                 }
 684 }