arch/arm/mach-u300/core.c

   1 /*
   2  *
   3  * arch/arm/mach-u300/core.c
   4  *
   5  *
   6  * Copyright (C) 2007-2009 ST-Ericsson AB
   7  * License terms: GNU General Public License (GPL) version 2
   8  * Core platform support, IRQ handling and device definitions.
   9  * Author: Linus Walleij <linus.walleij@stericsson.com>
  10  */
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13 #include <linux/spinlock.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/bitops.h>
  16 #include <linux/device.h>
  17 #include <linux/mm.h>
  18 #include <linux/termios.h>
  19 #include <linux/amba/bus.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/gpio.h>
  22
  23 #include <asm/types.h>
  24 #include <asm/setup.h>
  25 #include <asm/memory.h>
  26 #include <asm/hardware/vic.h>
  27 #include <asm/mach/map.h>
  28 #include <asm/mach/irq.h>
  29
  30 #include <mach/hardware.h>
  31 #include <mach/syscon.h>
  32
  33 #include "clock.h"
  34 #include "mmc.h"
  35 #include "spi.h"
  36 #include "i2c.h"
  37
  38 /*
  39  * Static I/O mappings that are needed for booting the U300 platforms. The
  40  * only things we need are the areas where we find the timer, syscon and
  41  * intcon, since the remaining device drivers will map their own memory
  42  * physical to virtual as the need arise.
  43  */
  44 static struct map_desc u300_io_desc[] __initdata = {
  45         {
  46                 .virtual        = U300_SLOW_PER_VIRT_BASE,
  47                 .pfn            = __phys_to_pfn(U300_SLOW_PER_PHYS_BASE),
  48                 .length         = SZ_64K,
  49                 .type           = MT_DEVICE,
  50         },
  51         {
  52                 .virtual        = U300_AHB_PER_VIRT_BASE,
  53                 .pfn            = __phys_to_pfn(U300_AHB_PER_PHYS_BASE),
  54                 .length         = SZ_32K,
  55                 .type           = MT_DEVICE,
  56         },
  57         {
  58                 .virtual        = U300_FAST_PER_VIRT_BASE,
  59                 .pfn            = __phys_to_pfn(U300_FAST_PER_PHYS_BASE),
  60                 .length         = SZ_32K,
  61                 .type           = MT_DEVICE,
  62         },
  63         {
  64                 .virtual        = 0xffff2000, /* TCM memory */
  65                 .pfn            = __phys_to_pfn(0xffff2000),
  66                 .length         = SZ_16K,
  67                 .type           = MT_DEVICE,
  68         },
  69
  70         /*
  71          * This overlaps with the IRQ vectors etc at 0xffff0000, so these
  72          * may have to be moved to 0x00000000 in order to use the ROM.
  73          */
  74         /*
  75         {
  76                 .virtual        = U300_BOOTROM_VIRT_BASE,
  77                 .pfn            = __phys_to_pfn(U300_BOOTROM_PHYS_BASE),
  78                 .length         = SZ_64K,
  79                 .type           = MT_ROM,
  80         },
  81         */
  82 };
  83
  84 void __init u300_map_io(void)
  85 {
  86         iotable_init(u300_io_desc, ARRAY_SIZE(u300_io_desc));
  87 }
  88
  89 /*
  90  * Declaration of devices found on the U300 board and
  91  * their respective memory locations.
  92  */
  93 static struct amba_device uart0_device = {
  94         .dev = {
  95                 .init_name = "uart0", /* Slow device at 0x3000 offset */
  96                 .platform_data = NULL,
  97         },
  98         .res = {
  99                 .start = U300_UART0_BASE,
 100                 .end   = U300_UART0_BASE + SZ_4K - 1,
 101                 .flags = IORESOURCE_MEM,
 102         },
 103         .irq = { IRQ_U300_UART0, NO_IRQ },
 104 };
 105
 106 /* The U335 have an additional UART1 on the APP CPU */
 107 #ifdef CONFIG_MACH_U300_BS335
 108 static struct amba_device uart1_device = {
 109         .dev = {
 110                 .init_name = "uart1", /* Fast device at 0x7000 offset */
 111                 .platform_data = NULL,
 112         },
 113         .res = {
 114                 .start = U300_UART1_BASE,
 115                 .end   = U300_UART1_BASE + SZ_4K - 1,
 116                 .flags = IORESOURCE_MEM,
 117         },
 118         .irq = { IRQ_U300_UART1, NO_IRQ },
 119 };
 120 #endif
 121
 122 static struct amba_device pl172_device = {
 123         .dev = {
 124                 .init_name = "pl172", /* AHB device at 0x4000 offset */
 125                 .platform_data = NULL,
 126         },
 127         .res = {
 128                 .start = U300_EMIF_CFG_BASE,
 129                 .end   = U300_EMIF_CFG_BASE + SZ_4K - 1,
 130                 .flags = IORESOURCE_MEM,
 131         },
 132 };
 133
 134
 135 /*
 136  * Everything within this next ifdef deals with external devices connected to
 137  * the APP SPI bus.
 138  */
 139 static struct amba_device pl022_device = {
 140         .dev = {
 141                 .coherent_dma_mask = ~0,
 142                 .init_name = "pl022", /* Fast device at 0x6000 offset */
 143         },
 144         .res = {
 145                 .start = U300_SPI_BASE,
 146                 .end   = U300_SPI_BASE + SZ_4K - 1,
 147                 .flags = IORESOURCE_MEM,
 148         },
 149         .irq = {IRQ_U300_SPI, NO_IRQ },
 150         /*
 151          * This device has a DMA channel but the Linux driver does not use
 152          * it currently.
 153          */
 154 };
 155
 156 static struct amba_device mmcsd_device = {
 157         .dev = {
 158                 .init_name = "mmci", /* Fast device at 0x1000 offset */
 159                 .platform_data = NULL, /* Added later */
 160         },
 161         .res = {
 162                 .start = U300_MMCSD_BASE,
 163                 .end   = U300_MMCSD_BASE + SZ_4K - 1,
 164                 .flags = IORESOURCE_MEM,
 165         },
 166         .irq = {IRQ_U300_MMCSD_MCIINTR0, IRQ_U300_MMCSD_MCIINTR1 },
 167         /*
 168          * This device has a DMA channel but the Linux driver does not use
 169          * it currently.
 170          */
 171 };
 172
 173 /*
 174  * The order of device declaration may be important, since some devices
 175  * have dependencies on other devices being initialized first.
 176  */
 177 static struct amba_device *amba_devs[] __initdata = {
 178         &uart0_device,
 179 #ifdef CONFIG_MACH_U300_BS335
 180         &uart1_device,
 181 #endif
 182         &pl022_device,
 183         &pl172_device,
 184         &mmcsd_device,
 185 };
 186
 187 /* Here follows a list of all hw resources that the platform devices
 188  * allocate. Note, clock dependencies are not included
 189  */
 190
 191 static struct resource gpio_resources[] = {
 192         {
 193                 .start = U300_GPIO_BASE,
 194                 .end   = (U300_GPIO_BASE + SZ_4K - 1),
 195                 .flags = IORESOURCE_MEM,
 196         },
 197         {
 198                 .name  = "gpio0",
 199                 .start = IRQ_U300_GPIO_PORT0,
 200                 .end   = IRQ_U300_GPIO_PORT0,
 201                 .flags = IORESOURCE_IRQ,
 202         },
 203         {
 204                 .name  = "gpio1",
 205                 .start = IRQ_U300_GPIO_PORT1,
 206                 .end   = IRQ_U300_GPIO_PORT1,
 207                 .flags = IORESOURCE_IRQ,
 208         },
 209         {
 210                 .name  = "gpio2",
 211                 .start = IRQ_U300_GPIO_PORT2,
 212                 .end   = IRQ_U300_GPIO_PORT2,
 213                 .flags = IORESOURCE_IRQ,
 214         },
 215 #ifdef U300_COH901571_3
 216         {
 217                 .name  = "gpio3",
 218                 .start = IRQ_U300_GPIO_PORT3,
 219                 .end   = IRQ_U300_GPIO_PORT3,
 220                 .flags = IORESOURCE_IRQ,
 221         },
 222         {
 223                 .name  = "gpio4",
 224                 .start = IRQ_U300_GPIO_PORT4,
 225                 .end   = IRQ_U300_GPIO_PORT4,
 226                 .flags = IORESOURCE_IRQ,
 227         },
 228 #ifdef CONFIG_MACH_U300_BS335
 229         {
 230                 .name  = "gpio5",
 231                 .start = IRQ_U300_GPIO_PORT5,
 232                 .end   = IRQ_U300_GPIO_PORT5,
 233                 .flags = IORESOURCE_IRQ,
 234         },
 235         {
 236                 .name  = "gpio6",
 237                 .start = IRQ_U300_GPIO_PORT6,
 238                 .end   = IRQ_U300_GPIO_PORT6,
 239                 .flags = IORESOURCE_IRQ,
 240         },
 241 #endif /* CONFIG_MACH_U300_BS335 */
 242 #endif /* U300_COH901571_3 */
 243 };
 244
 245 static struct resource keypad_resources[] = {
 246         {
 247                 .start = U300_KEYPAD_BASE,
 248                 .end   = U300_KEYPAD_BASE + SZ_4K - 1,
 249                 .flags = IORESOURCE_MEM,
 250         },
 251         {
 252                 .name  = "coh901461-press",
 253                 .start = IRQ_U300_KEYPAD_KEYBF,
 254                 .end   = IRQ_U300_KEYPAD_KEYBF,
 255                 .flags = IORESOURCE_IRQ,
 256         },
 257         {
 258                 .name  = "coh901461-release",
 259                 .start = IRQ_U300_KEYPAD_KEYBR,
 260                 .end   = IRQ_U300_KEYPAD_KEYBR,
 261                 .flags = IORESOURCE_IRQ,
 262         },
 263 };
 264
 265 static struct resource rtc_resources[] = {
 266         {
 267                 .start = U300_RTC_BASE,
 268                 .end   = U300_RTC_BASE + SZ_4K - 1,
 269                 .flags = IORESOURCE_MEM,
 270         },
 271         {
 272                 .start = IRQ_U300_RTC,
 273                 .end   = IRQ_U300_RTC,
 274                 .flags = IORESOURCE_IRQ,
 275         },
 276 };
 277
 278 /*
 279  * Fsmc does have IRQs: #43 and #44 (NFIF and NFIF2)
 280  * but these are not yet used by the driver.
 281  */
 282 static struct resource fsmc_resources[] = {
 283         {
 284                 .start = U300_NAND_IF_PHYS_BASE,
 285                 .end   = U300_NAND_IF_PHYS_BASE + SZ_4K - 1,
 286                 .flags = IORESOURCE_MEM,
 287         },
 288 };
 289
 290 static struct resource i2c0_resources[] = {
 291         {
 292                 .start = U300_I2C0_BASE,
 293                 .end   = U300_I2C0_BASE + SZ_4K - 1,
 294                 .flags = IORESOURCE_MEM,
 295         },
 296         {
 297                 .start = IRQ_U300_I2C0,
 298                 .end   = IRQ_U300_I2C0,
 299                 .flags = IORESOURCE_IRQ,
 300         },
 301 };
 302
 303 static struct resource i2c1_resources[] = {
 304         {
 305                 .start = U300_I2C1_BASE,
 306                 .end   = U300_I2C1_BASE + SZ_4K - 1,
 307                 .flags = IORESOURCE_MEM,
 308         },
 309         {
 310                 .start = IRQ_U300_I2C1,
 311                 .end   = IRQ_U300_I2C1,
 312                 .flags = IORESOURCE_IRQ,
 313         },
 314
 315 };
 316
 317 static struct resource wdog_resources[] = {
 318         {
 319                 .start = U300_WDOG_BASE,
 320                 .end   = U300_WDOG_BASE + SZ_4K - 1,
 321                 .flags = IORESOURCE_MEM,
 322         },
 323         {
 324                 .start = IRQ_U300_WDOG,
 325                 .end   = IRQ_U300_WDOG,
 326                 .flags = IORESOURCE_IRQ,
 327         }
 328 };
 329
 330 /* TODO: These should be protected by suitable #ifdef's */
 331 static struct resource ave_resources[] = {
 332         {
 333                 .name  = "AVE3e I/O Area",
 334                 .start = U300_VIDEOENC_BASE,
 335                 .end   = U300_VIDEOENC_BASE + SZ_512K - 1,
 336                 .flags = IORESOURCE_MEM,
 337         },
 338         {
 339                 .name  = "AVE3e IRQ0",
 340                 .start = IRQ_U300_VIDEO_ENC_0,
 341                 .end   = IRQ_U300_VIDEO_ENC_0,
 342                 .flags = IORESOURCE_IRQ,
 343         },
 344         {
 345                 .name  = "AVE3e IRQ1",
 346                 .start = IRQ_U300_VIDEO_ENC_1,
 347                 .end   = IRQ_U300_VIDEO_ENC_1,
 348                 .flags = IORESOURCE_IRQ,
 349         },
 350         {
 351                 .name  = "AVE3e Physmem Area",
 352                 .start = 0, /* 0 will be remapped to reserved memory */
 353                 .end   = SZ_1M - 1,
 354                 .flags = IORESOURCE_MEM,
 355         },
 356         /*
 357          * The AVE3e requires two regions of 256MB that it considers
 358          * "invisible". The hardware will not be able to access these
 359          * adresses, so they should never point to system RAM.
 360          */
 361         {
 362                 .name  = "AVE3e Reserved 0",
 363                 .start = 0xd0000000,
 364                 .end   = 0xd0000000 + SZ_256M - 1,
 365                 .flags = IORESOURCE_MEM,
 366         },
 367         {
 368                 .name  = "AVE3e Reserved 1",
 369                 .start = 0xe0000000,
 370                 .end   = 0xe0000000 + SZ_256M - 1,
 371                 .flags = IORESOURCE_MEM,
 372         },
 373 };
 374
 375 static struct platform_device wdog_device = {
 376         .name = "wdog",
 377         .id = -1,
 378         .num_resources = ARRAY_SIZE(wdog_resources),
 379         .resource = wdog_resources,
 380 };
 381
 382 static struct platform_device i2c0_device = {
 383         .name = "stu300",
 384         .id = 0,
 385         .num_resources = ARRAY_SIZE(i2c0_resources),
 386         .resource = i2c0_resources,
 387 };
 388
 389 static struct platform_device i2c1_device = {
 390         .name = "stu300",
 391         .id = 1,
 392         .num_resources = ARRAY_SIZE(i2c1_resources),
 393         .resource = i2c1_resources,
 394 };
 395
 396 static struct platform_device gpio_device = {
 397         .name = "u300-gpio",
 398         .id = -1,
 399         .num_resources = ARRAY_SIZE(gpio_resources),
 400         .resource = gpio_resources,
 401 };
 402
 403 static struct platform_device keypad_device = {
 404         .name = "keypad",
 405         .id = -1,
 406         .num_resources = ARRAY_SIZE(keypad_resources),
 407         .resource = keypad_resources,
 408 };
 409
 410 static struct platform_device rtc_device = {
 411         .name = "rtc0",
 412         .id = -1,
 413         .num_resources = ARRAY_SIZE(rtc_resources),
 414         .resource = rtc_resources,
 415 };
 416
 417 static struct platform_device fsmc_device = {
 418         .name = "nandif",
 419         .id = -1,
 420         .num_resources = ARRAY_SIZE(fsmc_resources),
 421         .resource = fsmc_resources,
 422 };
 423
 424 static struct platform_device ave_device = {
 425         .name = "video_enc",
 426         .id = -1,
 427         .num_resources = ARRAY_SIZE(ave_resources),
 428         .resource = ave_resources,
 429 };
 430
 431 /*
 432  * Notice that AMBA devices are initialized before platform devices.
 433  *
 434  */
 435 static struct platform_device *platform_devs[] __initdata = {
 436         &i2c0_device,
 437         &i2c1_device,
 438         &keypad_device,
 439         &rtc_device,
 440         &gpio_device,
 441         &fsmc_device,
 442         &wdog_device,
 443         &ave_device
 444 };
 445
 446
 447 /*
 448  * Interrupts: the U300 platforms have two pl190 ARM PrimeCells connected
 449  * together so some interrupts are connected to the first one and some
 450  * to the second one.
 451  */
 452 void __init u300_init_irq(void)
 453 {
 454         u32 mask[2] = {0, 0};
 455         int i;
 456
 457         for (i = 0; i < NR_IRQS; i++)
 458                 set_bit(i, (unsigned long *) &mask[0]);
 459         u300_enable_intcon_clock();
 460         vic_init((void __iomem *) U300_INTCON0_VBASE, 0, mask[0], mask[0]);
 461         vic_init((void __iomem *) U300_INTCON1_VBASE, 32, mask[1], mask[1]);
 462 }
 463
 464
 465 /*
 466  * U300 platforms peripheral handling
 467  */
 468 struct db_chip {
 469         u16 chipid;
 470         const char *name;
 471 };
 472
 473 /*
 474  * This is a list of the Digital Baseband chips used in the U300 platform.
 475  */
 476 static struct db_chip db_chips[] __initdata = {
 477         {
 478                 .chipid = 0xb800,
 479                 .name = "DB3000",
 480         },
 481         {
 482                 .chipid = 0xc000,
 483                 .name = "DB3100",
 484         },
 485         {
 486                 .chipid = 0xc800,
 487                 .name = "DB3150",
 488         },
 489         {
 490                 .chipid = 0xd800,
 491                 .name = "DB3200",
 492         },
 493         {
 494                 .chipid = 0xe000,
 495                 .name = "DB3250",
 496         },
 497         {
 498                 .chipid = 0xe800,
 499                 .name = "DB3210",
 500         },
 501         {
 502                 .chipid = 0xf000,
 503                 .name = "DB3350 P1x",
 504         },
 505         {
 506                 .chipid = 0xf100,
 507                 .name = "DB3350 P2x",
 508         },
 509         {
 510                 .chipid = 0x0000, /* List terminator */
 511                 .name = NULL,
 512         }
 513 };
 514
 515 static void __init u300_init_check_chip(void)
 516 {
 517
 518         u16 val;
 519         struct db_chip *chip;
 520         const char *chipname;
 521         const char unknown[] = "UNKNOWN";
 522
 523         /* Read out and print chip ID */
 524         val = readw(U300_SYSCON_VBASE + U300_SYSCON_CIDR);
 525         /* This is in funky bigendian order... */
 526         val = (val & 0xFFU) << 8 | (val >> 8);
 527         chip = db_chips;
 528         chipname = unknown;
 529
 530         for ( ; chip->chipid; chip++) {
 531                 if (chip->chipid == (val & 0xFF00U)) {
 532                         chipname = chip->name;
 533                         break;
 534                 }
 535         }
 536         printk(KERN_INFO "Initializing U300 system on %s baseband chip " \
 537                "(chip ID 0x%04x)\n", chipname, val);
 538
 539 #ifdef CONFIG_MACH_U300_BS26
 540         if ((val & 0xFF00U) != 0xc800) {
 541                 printk(KERN_ERR "Platform configured for BS25/BS26 " \
 542                        "with DB3150 but %s detected, expect problems!",
 543                        chipname);
 544         }
 545 #endif
 546 #ifdef CONFIG_MACH_U300_BS330
 547         if ((val & 0xFF00U) != 0xd800) {
 548                 printk(KERN_ERR "Platform configured for BS330 " \
 549                        "with DB3200 but %s detected, expect problems!",
 550                        chipname);
 551         }
 552 #endif
 553 #ifdef CONFIG_MACH_U300_BS335
 554         if ((val & 0xFF00U) != 0xf000 && (val & 0xFF00U) != 0xf100) {
 555                 printk(KERN_ERR "Platform configured for BS365 " \
 556                        " with DB3350 but %s detected, expect problems!",
 557                        chipname);
 558         }
 559 #endif
 560 #ifdef CONFIG_MACH_U300_BS365
 561         if ((val & 0xFF00U) != 0xe800) {
 562                 printk(KERN_ERR "Platform configured for BS365 " \
 563                        "with DB3210 but %s detected, expect problems!",
 564                        chipname);
 565         }
 566 #endif
 567
 568
 569 }
 570
 571 /*
 572  * Some devices and their resources require reserved physical memory from
 573  * the end of the available RAM. This function traverses the list of devices
 574  * and assigns actual adresses to these.
 575  */
 576 static void __init u300_assign_physmem(void)
 577 {
 578         unsigned long curr_start = __pa(high_memory);
 579         int i, j;
 580
 581         for (i = 0; i < ARRAY_SIZE(platform_devs); i++) {
 582                 for (j = 0; j < platform_devs[i]->num_resources; j++) {
 583                         struct resource *const res =
 584                           &platform_devs[i]->resource[j];
 585
 586                         if (IORESOURCE_MEM == res->flags &&
 587                                      0 == res->start) {
 588                                 res->start  = curr_start;
 589                                 res->end   += curr_start;
 590                                 curr_start += (res->end - res->start + 1);
 591
 592                                 printk(KERN_INFO "core.c: Mapping RAM " \
 593                                        "%#x-%#x to device %s:%s\n",
 594                                         res->start, res->end,
 595                                        platform_devs[i]->name, res->name);
 596                         }
 597                 }
 598         }
 599 }
 600
 601 void __init u300_init_devices(void)
 602 {
 603         int i;
 604         u16 val;
 605
 606         /* Check what platform we run and print some status information */
 607         u300_init_check_chip();
 608
 609         /* Set system to run at PLL208, max performance, a known state. */
 610         val = readw(U300_SYSCON_VBASE + U300_SYSCON_CCR);
 611         val &= ~U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK;
 612         writew(val, U300_SYSCON_VBASE + U300_SYSCON_CCR);
 613         /* Wait for the PLL208 to lock if not locked in yet */
 614         while (!(readw(U300_SYSCON_VBASE + U300_SYSCON_CSR) &
 615                  U300_SYSCON_CSR_PLL208_LOCK_IND));
 616         /* Initialize SPI device with some board specifics */
 617         u300_spi_init(&pl022_device);
 618
 619         /* Register the AMBA devices in the AMBA bus abstraction layer */
 620         u300_clock_primecells();
 621         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 622                 struct amba_device *d = amba_devs[i];
 623                 amba_device_register(d, &iomem_resource);
 624         }
 625         u300_unclock_primecells();
 626
 627         u300_assign_physmem();
 628
 629         /* Register subdevices on the I2C buses */
 630         u300_i2c_register_board_devices();
 631
 632         /* Register subdevices on the SPI bus */
 633         u300_spi_register_board_devices();
 634
 635         /* Register the platform devices */
 636         platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
 637
 638 #ifndef CONFIG_MACH_U300_SEMI_IS_SHARED
 639         /*
 640          * Enable SEMI self refresh. Self-refresh of the SDRAM is entered when
 641          * both subsystems are requesting this mode.
 642          * If we not share the Acc SDRAM, this is never the case. Therefore
 643          * enable it here from the App side.
 644          */
 645         val = readw(U300_SYSCON_VBASE + U300_SYSCON_SMCR) |
 646                 U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE;
 647         writew(val, U300_SYSCON_VBASE + U300_SYSCON_SMCR);
 648 #endif /* CONFIG_MACH_U300_SEMI_IS_SHARED */
 649 }
 650
 651 static int core_module_init(void)
 652 {
 653         /*
 654          * This needs to be initialized later: it needs the input framework
 655          * to be initialized first.
 656          */
 657         return mmc_init(&mmcsd_device);
 658 }
 659 module_init(core_module_init);