arch/arm/mach-kirkwood/common.c

   1 /*
   2  * arch/arm/mach-kirkwood/common.c
   3  *
   4  * Core functions for Marvell Kirkwood SoCs
   5  *
   6  * This file is licensed under the terms of the GNU General Public
   7  * License version 2.  This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/serial_8250.h>
  15 #include <linux/ata_platform.h>
  16 #include <linux/mtd/nand.h>
  17 #include <linux/dma-mapping.h>
  18 #include <net/dsa.h>
  19 #include <asm/page.h>
  20 #include <asm/timex.h>
  21 #include <asm/kexec.h>
  22 #include <asm/mach/map.h>
  23 #include <asm/mach/time.h>
  24 #include <mach/kirkwood.h>
  25 #include <mach/bridge-regs.h>
  26 #include <plat/audio.h>
  27 #include <plat/cache-feroceon-l2.h>
  28 #include <plat/mvsdio.h>
  29 #include <plat/orion_nand.h>
  30 #include <plat/ehci-orion.h>
  31 #include <plat/common.h>
  32 #include <plat/time.h>
  33 #include <plat/addr-map.h>
  34 #include "common.h"
  35
  36 /*****************************************************************************
  37  * I/O Address Mapping
  38  ****************************************************************************/
  39 static struct map_desc kirkwood_io_desc[] __initdata = {
  40         {
  41                 .virtual        = KIRKWOOD_PCIE_IO_VIRT_BASE,
  42                 .pfn            = __phys_to_pfn(KIRKWOOD_PCIE_IO_PHYS_BASE),
  43                 .length         = KIRKWOOD_PCIE_IO_SIZE,
  44                 .type           = MT_DEVICE,
  45         }, {
  46                 .virtual        = KIRKWOOD_PCIE1_IO_VIRT_BASE,
  47                 .pfn            = __phys_to_pfn(KIRKWOOD_PCIE1_IO_PHYS_BASE),
  48                 .length         = KIRKWOOD_PCIE1_IO_SIZE,
  49                 .type           = MT_DEVICE,
  50         }, {
  51                 .virtual        = KIRKWOOD_REGS_VIRT_BASE,
  52                 .pfn            = __phys_to_pfn(KIRKWOOD_REGS_PHYS_BASE),
  53                 .length         = KIRKWOOD_REGS_SIZE,
  54                 .type           = MT_DEVICE,
  55         },
  56 };
  57
  58 void __init kirkwood_map_io(void)
  59 {
  60         iotable_init(kirkwood_io_desc, ARRAY_SIZE(kirkwood_io_desc));
  61 }
  62
  63 /*
  64  * Default clock control bits.  Any bit _not_ set in this variable
  65  * will be cleared from the hardware after platform devices have been
  66  * registered.  Some reserved bits must be set to 1.
  67  */
  68 unsigned int kirkwood_clk_ctrl = CGC_DUNIT | CGC_RESERVED;
  69
  70
  71 /*****************************************************************************
  72  * EHCI0
  73  ****************************************************************************/
  74 void __init kirkwood_ehci_init(void)
  75 {
  76         kirkwood_clk_ctrl |= CGC_USB0;
  77         orion_ehci_init(USB_PHYS_BASE, IRQ_KIRKWOOD_USB, EHCI_PHY_NA);
  78 }
  79
  80
  81 /*****************************************************************************
  82  * GE00
  83  ****************************************************************************/
  84 void __init kirkwood_ge00_init(struct mv643xx_eth_platform_data *eth_data)
  85 {
  86         kirkwood_clk_ctrl |= CGC_GE0;
  87
  88         orion_ge00_init(eth_data,
  89                         GE00_PHYS_BASE, IRQ_KIRKWOOD_GE00_SUM,
  90                         IRQ_KIRKWOOD_GE00_ERR, kirkwood_tclk);
  91 }
  92
  93
  94 /*****************************************************************************
  95  * GE01
  96  ****************************************************************************/
  97 void __init kirkwood_ge01_init(struct mv643xx_eth_platform_data *eth_data)
  98 {
  99
 100         kirkwood_clk_ctrl |= CGC_GE1;
 101
 102         orion_ge01_init(eth_data,
 103                         GE01_PHYS_BASE, IRQ_KIRKWOOD_GE01_SUM,
 104                         IRQ_KIRKWOOD_GE01_ERR, kirkwood_tclk);
 105 }
 106
 107
 108 /*****************************************************************************
 109  * Ethernet switch
 110  ****************************************************************************/
 111 void __init kirkwood_ge00_switch_init(struct dsa_platform_data *d, int irq)
 112 {
 113         orion_ge00_switch_init(d, irq);
 114 }
 115
 116
 117 /*****************************************************************************
 118  * NAND flash
 119  ****************************************************************************/
 120 static struct resource kirkwood_nand_resource = {
 121         .flags          = IORESOURCE_MEM,
 122         .start          = KIRKWOOD_NAND_MEM_PHYS_BASE,
 123         .end            = KIRKWOOD_NAND_MEM_PHYS_BASE +
 124                                 KIRKWOOD_NAND_MEM_SIZE - 1,
 125 };
 126
 127 static struct orion_nand_data kirkwood_nand_data = {
 128         .cle            = 0,
 129         .ale            = 1,
 130         .width          = 8,
 131 };
 132
 133 static struct platform_device kirkwood_nand_flash = {
 134         .name           = "orion_nand",
 135         .id             = -1,
 136         .dev            = {
 137                 .platform_data  = &kirkwood_nand_data,
 138         },
 139         .resource       = &kirkwood_nand_resource,
 140         .num_resources  = 1,
 141 };
 142
 143 void __init kirkwood_nand_init(struct mtd_partition *parts, int nr_parts,
 144                                int chip_delay)
 145 {
 146         kirkwood_clk_ctrl |= CGC_RUNIT;
 147         kirkwood_nand_data.parts = parts;
 148         kirkwood_nand_data.nr_parts = nr_parts;
 149         kirkwood_nand_data.chip_delay = chip_delay;
 150         platform_device_register(&kirkwood_nand_flash);
 151 }
 152
 153 void __init kirkwood_nand_init_rnb(struct mtd_partition *parts, int nr_parts,
 154                                    int (*dev_ready)(struct mtd_info *))
 155 {
 156         kirkwood_clk_ctrl |= CGC_RUNIT;
 157         kirkwood_nand_data.parts = parts;
 158         kirkwood_nand_data.nr_parts = nr_parts;
 159         kirkwood_nand_data.dev_ready = dev_ready;
 160         platform_device_register(&kirkwood_nand_flash);
 161 }
 162
 163 /*****************************************************************************
 164  * SoC RTC
 165  ****************************************************************************/
 166 static void __init kirkwood_rtc_init(void)
 167 {
 168         orion_rtc_init(RTC_PHYS_BASE, IRQ_KIRKWOOD_RTC);
 169 }
 170
 171
 172 /*****************************************************************************
 173  * SATA
 174  ****************************************************************************/
 175 void __init kirkwood_sata_init(struct mv_sata_platform_data *sata_data)
 176 {
 177         kirkwood_clk_ctrl |= CGC_SATA0;
 178         if (sata_data->n_ports > 1)
 179                 kirkwood_clk_ctrl |= CGC_SATA1;
 180
 181         orion_sata_init(sata_data, SATA_PHYS_BASE, IRQ_KIRKWOOD_SATA);
 182 }
 183
 184
 185 /*****************************************************************************
 186  * SD/SDIO/MMC
 187  ****************************************************************************/
 188 static struct resource mvsdio_resources[] = {
 189         [0] = {
 190                 .start  = SDIO_PHYS_BASE,
 191                 .end    = SDIO_PHYS_BASE + SZ_1K - 1,
 192                 .flags  = IORESOURCE_MEM,
 193         },
 194         [1] = {
 195                 .start  = IRQ_KIRKWOOD_SDIO,
 196                 .end    = IRQ_KIRKWOOD_SDIO,
 197                 .flags  = IORESOURCE_IRQ,
 198         },
 199 };
 200
 201 static u64 mvsdio_dmamask = DMA_BIT_MASK(32);
 202
 203 static struct platform_device kirkwood_sdio = {
 204         .name           = "mvsdio",
 205         .id             = -1,
 206         .dev            = {
 207                 .dma_mask = &mvsdio_dmamask,
 208                 .coherent_dma_mask = DMA_BIT_MASK(32),
 209         },
 210         .num_resources  = ARRAY_SIZE(mvsdio_resources),
 211         .resource       = mvsdio_resources,
 212 };
 213
 214 void __init kirkwood_sdio_init(struct mvsdio_platform_data *mvsdio_data)
 215 {
 216         u32 dev, rev;
 217
 218         kirkwood_pcie_id(&dev, &rev);
 219         if (rev == 0 && dev != MV88F6282_DEV_ID) /* catch all Kirkwood Z0's */
 220                 mvsdio_data->clock = 100000000;
 221         else
 222                 mvsdio_data->clock = 200000000;
 223         kirkwood_clk_ctrl |= CGC_SDIO;
 224         kirkwood_sdio.dev.platform_data = mvsdio_data;
 225         platform_device_register(&kirkwood_sdio);
 226 }
 227
 228
 229 /*****************************************************************************
 230  * SPI
 231  ****************************************************************************/
 232 void __init kirkwood_spi_init()
 233 {
 234         kirkwood_clk_ctrl |= CGC_RUNIT;
 235         orion_spi_init(SPI_PHYS_BASE, kirkwood_tclk);
 236 }
 237
 238
 239 /*****************************************************************************
 240  * I2C
 241  ****************************************************************************/
 242 void __init kirkwood_i2c_init(void)
 243 {
 244         orion_i2c_init(I2C_PHYS_BASE, IRQ_KIRKWOOD_TWSI, 8);
 245 }
 246
 247
 248 /*****************************************************************************
 249  * UART0
 250  ****************************************************************************/
 251
 252 void __init kirkwood_uart0_init(void)
 253 {
 254         orion_uart0_init(UART0_VIRT_BASE, UART0_PHYS_BASE,
 255                          IRQ_KIRKWOOD_UART_0, kirkwood_tclk);
 256 }
 257
 258
 259 /*****************************************************************************
 260  * UART1
 261  ****************************************************************************/
 262 void __init kirkwood_uart1_init(void)
 263 {
 264         orion_uart1_init(UART1_VIRT_BASE, UART1_PHYS_BASE,
 265                          IRQ_KIRKWOOD_UART_1, kirkwood_tclk);
 266 }
 267
 268 /*****************************************************************************
 269  * Cryptographic Engines and Security Accelerator (CESA)
 270  ****************************************************************************/
 271 void __init kirkwood_crypto_init(void)
 272 {
 273         kirkwood_clk_ctrl |= CGC_CRYPTO;
 274         orion_crypto_init(CRYPTO_PHYS_BASE, KIRKWOOD_SRAM_PHYS_BASE,
 275                           KIRKWOOD_SRAM_SIZE, IRQ_KIRKWOOD_CRYPTO);
 276 }
 277
 278
 279 /*****************************************************************************
 280  * XOR0
 281  ****************************************************************************/
 282 static void __init kirkwood_xor0_init(void)
 283 {
 284         kirkwood_clk_ctrl |= CGC_XOR0;
 285
 286         orion_xor0_init(XOR0_PHYS_BASE, XOR0_HIGH_PHYS_BASE,
 287                         IRQ_KIRKWOOD_XOR_00, IRQ_KIRKWOOD_XOR_01);
 288 }
 289
 290
 291 /*****************************************************************************
 292  * XOR1
 293  ****************************************************************************/
 294 static void __init kirkwood_xor1_init(void)
 295 {
 296         kirkwood_clk_ctrl |= CGC_XOR1;
 297
 298         orion_xor1_init(XOR1_PHYS_BASE, XOR1_HIGH_PHYS_BASE,
 299                         IRQ_KIRKWOOD_XOR_10, IRQ_KIRKWOOD_XOR_11);
 300 }
 301
 302
 303 /*****************************************************************************
 304  * Watchdog
 305  ****************************************************************************/
 306 static void __init kirkwood_wdt_init(void)
 307 {
 308         orion_wdt_init(kirkwood_tclk);
 309 }
 310
 311
 312 /*****************************************************************************
 313  * Time handling
 314  ****************************************************************************/
 315 void __init kirkwood_init_early(void)
 316 {
 317         orion_time_set_base(TIMER_VIRT_BASE);
 318 }
 319
 320 int kirkwood_tclk;
 321
 322 static int __init kirkwood_find_tclk(void)
 323 {
 324         u32 dev, rev;
 325
 326         kirkwood_pcie_id(&dev, &rev);
 327
 328         if (dev == MV88F6281_DEV_ID || dev == MV88F6282_DEV_ID)
 329                 if (((readl(SAMPLE_AT_RESET) >> 21) & 1) == 0)
 330                         return 200000000;
 331
 332         return 166666667;
 333 }
 334
 335 static void __init kirkwood_timer_init(void)
 336 {
 337         kirkwood_tclk = kirkwood_find_tclk();
 338
 339         orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR,
 340                         IRQ_KIRKWOOD_BRIDGE, kirkwood_tclk);
 341 }
 342
 343 struct sys_timer kirkwood_timer = {
 344         .init = kirkwood_timer_init,
 345 };
 346
 347 /*****************************************************************************
 348  * Audio
 349  ****************************************************************************/
 350 static struct resource kirkwood_i2s_resources[] = {
 351         [0] = {
 352                 .start  = AUDIO_PHYS_BASE,
 353                 .end    = AUDIO_PHYS_BASE + SZ_16K - 1,
 354                 .flags  = IORESOURCE_MEM,
 355         },
 356         [1] = {
 357                 .start  = IRQ_KIRKWOOD_I2S,
 358                 .end    = IRQ_KIRKWOOD_I2S,
 359                 .flags  = IORESOURCE_IRQ,
 360         },
 361 };
 362
 363 static struct kirkwood_asoc_platform_data kirkwood_i2s_data = {
 364         .burst       = 128,
 365 };
 366
 367 static struct platform_device kirkwood_i2s_device = {
 368         .name           = "kirkwood-i2s",
 369         .id             = -1,
 370         .num_resources  = ARRAY_SIZE(kirkwood_i2s_resources),
 371         .resource       = kirkwood_i2s_resources,
 372         .dev            = {
 373                 .platform_data  = &kirkwood_i2s_data,
 374         },
 375 };
 376
 377 static struct platform_device kirkwood_pcm_device = {
 378         .name           = "kirkwood-pcm-audio",
 379         .id             = -1,
 380 };
 381
 382 void __init kirkwood_audio_init(void)
 383 {
 384         kirkwood_clk_ctrl |= CGC_AUDIO;
 385         platform_device_register(&kirkwood_i2s_device);
 386         platform_device_register(&kirkwood_pcm_device);
 387 }
 388
 389 /*****************************************************************************
 390  * General
 391  ****************************************************************************/
 392 /*
 393  * Identify device ID and revision.
 394  */
 395 static char * __init kirkwood_id(void)
 396 {
 397         u32 dev, rev;
 398
 399         kirkwood_pcie_id(&dev, &rev);
 400
 401         if (dev == MV88F6281_DEV_ID) {
 402                 if (rev == MV88F6281_REV_Z0)
 403                         return "MV88F6281-Z0";
 404                 else if (rev == MV88F6281_REV_A0)
 405                         return "MV88F6281-A0";
 406                 else if (rev == MV88F6281_REV_A1)
 407                         return "MV88F6281-A1";
 408                 else
 409                         return "MV88F6281-Rev-Unsupported";
 410         } else if (dev == MV88F6192_DEV_ID) {
 411                 if (rev == MV88F6192_REV_Z0)
 412                         return "MV88F6192-Z0";
 413                 else if (rev == MV88F6192_REV_A0)
 414                         return "MV88F6192-A0";
 415                 else if (rev == MV88F6192_REV_A1)
 416                         return "MV88F6192-A1";
 417                 else
 418                         return "MV88F6192-Rev-Unsupported";
 419         } else if (dev == MV88F6180_DEV_ID) {
 420                 if (rev == MV88F6180_REV_A0)
 421                         return "MV88F6180-Rev-A0";
 422                 else if (rev == MV88F6180_REV_A1)
 423                         return "MV88F6180-Rev-A1";
 424                 else
 425                         return "MV88F6180-Rev-Unsupported";
 426         } else if (dev == MV88F6282_DEV_ID) {
 427                 if (rev == MV88F6282_REV_A0)
 428                         return "MV88F6282-Rev-A0";
 429                 else if (rev == MV88F6282_REV_A1)
 430                         return "MV88F6282-Rev-A1";
 431                 else
 432                         return "MV88F6282-Rev-Unsupported";
 433         } else {
 434                 return "Device-Unknown";
 435         }
 436 }
 437
 438 static void __init kirkwood_l2_init(void)
 439 {
 440 #ifdef CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH
 441         writel(readl(L2_CONFIG_REG) | L2_WRITETHROUGH, L2_CONFIG_REG);
 442         feroceon_l2_init(1);
 443 #else
 444         writel(readl(L2_CONFIG_REG) & ~L2_WRITETHROUGH, L2_CONFIG_REG);
 445         feroceon_l2_init(0);
 446 #endif
 447 }
 448
 449 void __init kirkwood_init(void)
 450 {
 451         printk(KERN_INFO "Kirkwood: %s, TCLK=%d.\n",
 452                 kirkwood_id(), kirkwood_tclk);
 453         kirkwood_i2s_data.tclk = kirkwood_tclk;
 454
 455         /*
 456          * Disable propagation of mbus errors to the CPU local bus,
 457          * as this causes mbus errors (which can occur for example
 458          * for PCI aborts) to throw CPU aborts, which we're not set
 459          * up to deal with.
 460          */
 461         writel(readl(CPU_CONFIG) & ~CPU_CONFIG_ERROR_PROP, CPU_CONFIG);
 462
 463         kirkwood_setup_cpu_mbus();
 464
 465 #ifdef CONFIG_CACHE_FEROCEON_L2
 466         kirkwood_l2_init();
 467 #endif
 468
 469         /* internal devices that every board has */
 470         kirkwood_rtc_init();
 471         kirkwood_wdt_init();
 472         kirkwood_xor0_init();
 473         kirkwood_xor1_init();
 474         kirkwood_crypto_init();
 475
 476 #ifdef CONFIG_KEXEC
 477         kexec_reinit = kirkwood_enable_pcie;
 478 #endif
 479 }
 480
 481 static int __init kirkwood_clock_gate(void)
 482 {
 483         unsigned int curr = readl(CLOCK_GATING_CTRL);
 484         u32 dev, rev;
 485
 486         kirkwood_pcie_id(&dev, &rev);
 487         printk(KERN_DEBUG "Gating clock of unused units\n");
 488         printk(KERN_DEBUG "before: 0x%08x\n", curr);
 489
 490         /* Make sure those units are accessible */
 491         writel(curr | CGC_SATA0 | CGC_SATA1 | CGC_PEX0 | CGC_PEX1, CLOCK_GATING_CTRL);
 492
 493         /* For SATA: first shutdown the phy */
 494         if (!(kirkwood_clk_ctrl & CGC_SATA0)) {
 495                 /* Disable PLL and IVREF */
 496                 writel(readl(SATA0_PHY_MODE_2) & ~0xf, SATA0_PHY_MODE_2);
 497                 /* Disable PHY */
 498                 writel(readl(SATA0_IF_CTRL) | 0x200, SATA0_IF_CTRL);
 499         }
 500         if (!(kirkwood_clk_ctrl & CGC_SATA1)) {
 501                 /* Disable PLL and IVREF */
 502                 writel(readl(SATA1_PHY_MODE_2) & ~0xf, SATA1_PHY_MODE_2);
 503                 /* Disable PHY */
 504                 writel(readl(SATA1_IF_CTRL) | 0x200, SATA1_IF_CTRL);
 505         }
 506
 507         /* For PCIe: first shutdown the phy */
 508         if (!(kirkwood_clk_ctrl & CGC_PEX0)) {
 509                 writel(readl(PCIE_LINK_CTRL) | 0x10, PCIE_LINK_CTRL);
 510                 while (1)
 511                         if (readl(PCIE_STATUS) & 0x1)
 512                                 break;
 513                 writel(readl(PCIE_LINK_CTRL) & ~0x10, PCIE_LINK_CTRL);
 514         }
 515
 516         /* For PCIe 1: first shutdown the phy */
 517         if (dev == MV88F6282_DEV_ID) {
 518                 if (!(kirkwood_clk_ctrl & CGC_PEX1)) {
 519                         writel(readl(PCIE1_LINK_CTRL) | 0x10, PCIE1_LINK_CTRL);
 520                         while (1)
 521                                 if (readl(PCIE1_STATUS) & 0x1)
 522                                         break;
 523                         writel(readl(PCIE1_LINK_CTRL) & ~0x10, PCIE1_LINK_CTRL);
 524                 }
 525         } else  /* keep this bit set for devices that don't have PCIe1 */
 526                 kirkwood_clk_ctrl |= CGC_PEX1;
 527
 528         /* Now gate clock the required units */
 529         writel(kirkwood_clk_ctrl, CLOCK_GATING_CTRL);
 530         printk(KERN_DEBUG " after: 0x%08x\n", readl(CLOCK_GATING_CTRL));
 531
 532         return 0;
 533 }
 534 late_initcall(kirkwood_clock_gate);
 535
 536 void kirkwood_restart(char mode, const char *cmd)
 537 {
 538         /*
 539          * Enable soft reset to assert RSTOUTn.
 540          */
 541         writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);
 542
 543         /*
 544          * Assert soft reset.
 545          */
 546         writel(SOFT_RESET, SYSTEM_SOFT_RESET);
 547
 548         while (1)
 549                 ;
 550 }