arch/arm/mach-at91/setup.c

   1 /*
   2  * Copyright (C) 2007 Atmel Corporation.
   3  * Copyright (C) 2011 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
   4  *
   5  * Under GPLv2
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/io.h>
  10 #include <linux/mm.h>
  11 #include <linux/pm.h>
  12 #include <linux/of_address.h>
  13 #include <linux/pinctrl/machine.h>
  14
  15 #include <asm/system_misc.h>
  16 #include <asm/mach/map.h>
  17
  18 #include <mach/hardware.h>
  19 #include <mach/cpu.h>
  20 #include <mach/at91_dbgu.h>
  21 #include <mach/at91_pmc.h>
  22
  23 #include "at91_shdwc.h"
  24 #include "soc.h"
  25 #include "generic.h"
  26
  27 struct at91_init_soc __initdata at91_boot_soc;
  28
  29 struct at91_socinfo at91_soc_initdata;
  30 EXPORT_SYMBOL(at91_soc_initdata);
  31
  32 void __init at91rm9200_set_type(int type)
  33 {
  34         if (type == ARCH_REVISON_9200_PQFP)
  35                 at91_soc_initdata.subtype = AT91_SOC_RM9200_PQFP;
  36         else
  37                 at91_soc_initdata.subtype = AT91_SOC_RM9200_BGA;
  38
  39         pr_info("AT91: filled in soc subtype: %s\n",
  40                 at91_get_soc_subtype(&at91_soc_initdata));
  41 }
  42
  43 void __init at91_init_irq_default(void)
  44 {
  45         at91_init_interrupts(at91_boot_soc.default_irq_priority);
  46 }
  47
  48 void __init at91_init_interrupts(unsigned int *priority)
  49 {
  50         /* Initialize the AIC interrupt controller */
  51         at91_aic_init(priority, at91_boot_soc.extern_irq);
  52
  53         /* Enable GPIO interrupts */
  54         at91_gpio_irq_setup();
  55 }
  56
  57 void __iomem *at91_ramc_base[2];
  58 EXPORT_SYMBOL_GPL(at91_ramc_base);
  59
  60 void __init at91_ioremap_ramc(int id, u32 addr, u32 size)
  61 {
  62         if (id < 0 || id > 1) {
  63                 pr_emerg("Wrong RAM controller id (%d), cannot continue\n", id);
  64                 BUG();
  65         }
  66         at91_ramc_base[id] = ioremap(addr, size);
  67         if (!at91_ramc_base[id])
  68                 panic("Impossible to ioremap ramc.%d 0x%x\n", id, addr);
  69 }
  70
  71 static struct map_desc sram_desc[2] __initdata;
  72
  73 void __init at91_init_sram(int bank, unsigned long base, unsigned int length)
  74 {
  75         struct map_desc *desc = &sram_desc[bank];
  76
  77         desc->virtual = (unsigned long)AT91_IO_VIRT_BASE - length;
  78         if (bank > 0)
  79                 desc->virtual -= sram_desc[bank - 1].length;
  80
  81         desc->pfn = __phys_to_pfn(base);
  82         desc->length = length;
  83         desc->type = MT_MEMORY_NONCACHED;
  84
  85         pr_info("AT91: sram at 0x%lx of 0x%x mapped at 0x%lx\n",
  86                 base, length, desc->virtual);
  87
  88         iotable_init(desc, 1);
  89 }
  90
  91 static struct map_desc at91_io_desc __initdata __maybe_unused = {
  92         .virtual        = (unsigned long)AT91_VA_BASE_SYS,
  93         .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  94         .length         = SZ_16K,
  95         .type           = MT_DEVICE,
  96 };
  97
  98 static void __init soc_detect(u32 dbgu_base)
  99 {
 100         u32 cidr, socid;
 101
 102         cidr = __raw_readl(AT91_IO_P2V(dbgu_base) + AT91_DBGU_CIDR);
 103         socid = cidr & ~AT91_CIDR_VERSION;
 104
 105         switch (socid) {
 106         case ARCH_ID_AT91RM9200:
 107                 at91_soc_initdata.type = AT91_SOC_RM9200;
 108                 if (at91_soc_initdata.subtype == AT91_SOC_SUBTYPE_UNKNOWN)
 109                         at91_soc_initdata.subtype = AT91_SOC_RM9200_BGA;
 110                 at91_boot_soc = at91rm9200_soc;
 111                 break;
 112
 113         case ARCH_ID_AT91SAM9260:
 114                 at91_soc_initdata.type = AT91_SOC_SAM9260;
 115                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
 116                 at91_boot_soc = at91sam9260_soc;
 117                 break;
 118
 119         case ARCH_ID_AT91SAM9261:
 120                 at91_soc_initdata.type = AT91_SOC_SAM9261;
 121                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
 122                 at91_boot_soc = at91sam9261_soc;
 123                 break;
 124
 125         case ARCH_ID_AT91SAM9263:
 126                 at91_soc_initdata.type = AT91_SOC_SAM9263;
 127                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
 128                 at91_boot_soc = at91sam9263_soc;
 129                 break;
 130
 131         case ARCH_ID_AT91SAM9G20:
 132                 at91_soc_initdata.type = AT91_SOC_SAM9G20;
 133                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
 134                 at91_boot_soc = at91sam9260_soc;
 135                 break;
 136
 137         case ARCH_ID_AT91SAM9G45:
 138                 at91_soc_initdata.type = AT91_SOC_SAM9G45;
 139                 if (cidr == ARCH_ID_AT91SAM9G45ES)
 140                         at91_soc_initdata.subtype = AT91_SOC_SAM9G45ES;
 141                 at91_boot_soc = at91sam9g45_soc;
 142                 break;
 143
 144         case ARCH_ID_AT91SAM9RL64:
 145                 at91_soc_initdata.type = AT91_SOC_SAM9RL;
 146                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
 147                 at91_boot_soc = at91sam9rl_soc;
 148                 break;
 149
 150         case ARCH_ID_AT91SAM9X5:
 151                 at91_soc_initdata.type = AT91_SOC_SAM9X5;
 152                 at91_boot_soc = at91sam9x5_soc;
 153                 break;
 154
 155         case ARCH_ID_AT91SAM9N12:
 156                 at91_soc_initdata.type = AT91_SOC_SAM9N12;
 157                 at91_boot_soc = at91sam9n12_soc;
 158                 break;
 159
 160         case ARCH_ID_SAMA5D3:
 161                 at91_soc_initdata.type = AT91_SOC_SAMA5D3;
 162                 at91_boot_soc = sama5d3_soc;
 163                 break;
 164         }
 165
 166         /* at91sam9g10 */
 167         if ((socid & ~AT91_CIDR_EXT) == ARCH_ID_AT91SAM9G10) {
 168                 at91_soc_initdata.type = AT91_SOC_SAM9G10;
 169                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
 170                 at91_boot_soc = at91sam9261_soc;
 171         }
 172         /* at91sam9xe */
 173         else if ((cidr & AT91_CIDR_ARCH) == ARCH_FAMILY_AT91SAM9XE) {
 174                 at91_soc_initdata.type = AT91_SOC_SAM9260;
 175                 at91_soc_initdata.subtype = AT91_SOC_SAM9XE;
 176                 at91_boot_soc = at91sam9260_soc;
 177         }
 178
 179         if (!at91_soc_is_detected())
 180                 return;
 181
 182         at91_soc_initdata.cidr = cidr;
 183
 184         /* sub version of soc */
 185         at91_soc_initdata.exid = __raw_readl(AT91_IO_P2V(dbgu_base) + AT91_DBGU_EXID);
 186
 187         if (at91_soc_initdata.type == AT91_SOC_SAM9G45) {
 188                 switch (at91_soc_initdata.exid) {
 189                 case ARCH_EXID_AT91SAM9M10:
 190                         at91_soc_initdata.subtype = AT91_SOC_SAM9M10;
 191                         break;
 192                 case ARCH_EXID_AT91SAM9G46:
 193                         at91_soc_initdata.subtype = AT91_SOC_SAM9G46;
 194                         break;
 195                 case ARCH_EXID_AT91SAM9M11:
 196                         at91_soc_initdata.subtype = AT91_SOC_SAM9M11;
 197                         break;
 198                 }
 199         }
 200
 201         if (at91_soc_initdata.type == AT91_SOC_SAM9X5) {
 202                 switch (at91_soc_initdata.exid) {
 203                 case ARCH_EXID_AT91SAM9G15:
 204                         at91_soc_initdata.subtype = AT91_SOC_SAM9G15;
 205                         break;
 206                 case ARCH_EXID_AT91SAM9G35:
 207                         at91_soc_initdata.subtype = AT91_SOC_SAM9G35;
 208                         break;
 209                 case ARCH_EXID_AT91SAM9X35:
 210                         at91_soc_initdata.subtype = AT91_SOC_SAM9X35;
 211                         break;
 212                 case ARCH_EXID_AT91SAM9G25:
 213                         at91_soc_initdata.subtype = AT91_SOC_SAM9G25;
 214                         break;
 215                 case ARCH_EXID_AT91SAM9X25:
 216                         at91_soc_initdata.subtype = AT91_SOC_SAM9X25;
 217                         break;
 218                 }
 219         }
 220
 221         if (at91_soc_initdata.type == AT91_SOC_SAMA5D3) {
 222                 switch (at91_soc_initdata.exid) {
 223                 case ARCH_EXID_SAMA5D31:
 224                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D31;
 225                         break;
 226                 case ARCH_EXID_SAMA5D33:
 227                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D33;
 228                         break;
 229                 case ARCH_EXID_SAMA5D34:
 230                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D34;
 231                         break;
 232                 case ARCH_EXID_SAMA5D35:
 233                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D35;
 234                         break;
 235                 }
 236         }
 237 }
 238
 239 static const char *soc_name[] = {
 240         [AT91_SOC_RM9200]       = "at91rm9200",
 241         [AT91_SOC_SAM9260]      = "at91sam9260",
 242         [AT91_SOC_SAM9261]      = "at91sam9261",
 243         [AT91_SOC_SAM9263]      = "at91sam9263",
 244         [AT91_SOC_SAM9G10]      = "at91sam9g10",
 245         [AT91_SOC_SAM9G20]      = "at91sam9g20",
 246         [AT91_SOC_SAM9G45]      = "at91sam9g45",
 247         [AT91_SOC_SAM9RL]       = "at91sam9rl",
 248         [AT91_SOC_SAM9X5]       = "at91sam9x5",
 249         [AT91_SOC_SAM9N12]      = "at91sam9n12",
 250         [AT91_SOC_SAMA5D3]      = "sama5d3",
 251         [AT91_SOC_UNKNOWN]      = "Unknown",
 252 };
 253
 254 const char *at91_get_soc_type(struct at91_socinfo *c)
 255 {
 256         return soc_name[c->type];
 257 }
 258 EXPORT_SYMBOL(at91_get_soc_type);
 259
 260 static const char *soc_subtype_name[] = {
 261         [AT91_SOC_RM9200_BGA]   = "at91rm9200 BGA",
 262         [AT91_SOC_RM9200_PQFP]  = "at91rm9200 PQFP",
 263         [AT91_SOC_SAM9XE]       = "at91sam9xe",
 264         [AT91_SOC_SAM9G45ES]    = "at91sam9g45es",
 265         [AT91_SOC_SAM9M10]      = "at91sam9m10",
 266         [AT91_SOC_SAM9G46]      = "at91sam9g46",
 267         [AT91_SOC_SAM9M11]      = "at91sam9m11",
 268         [AT91_SOC_SAM9G15]      = "at91sam9g15",
 269         [AT91_SOC_SAM9G35]      = "at91sam9g35",
 270         [AT91_SOC_SAM9X35]      = "at91sam9x35",
 271         [AT91_SOC_SAM9G25]      = "at91sam9g25",
 272         [AT91_SOC_SAM9X25]      = "at91sam9x25",
 273         [AT91_SOC_SAMA5D31]     = "sama5d31",
 274         [AT91_SOC_SAMA5D33]     = "sama5d33",
 275         [AT91_SOC_SAMA5D34]     = "sama5d34",
 276         [AT91_SOC_SAMA5D35]     = "sama5d35",
 277         [AT91_SOC_SUBTYPE_NONE] = "None",
 278         [AT91_SOC_SUBTYPE_UNKNOWN] = "Unknown",
 279 };
 280
 281 const char *at91_get_soc_subtype(struct at91_socinfo *c)
 282 {
 283         return soc_subtype_name[c->subtype];
 284 }
 285 EXPORT_SYMBOL(at91_get_soc_subtype);
 286
 287 void __init at91_map_io(void)
 288 {
 289         /* Map peripherals */
 290         iotable_init(&at91_io_desc, 1);
 291
 292         at91_soc_initdata.type = AT91_SOC_UNKNOWN;
 293         at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_UNKNOWN;
 294
 295         soc_detect(AT91_BASE_DBGU0);
 296         if (!at91_soc_is_detected())
 297                 soc_detect(AT91_BASE_DBGU1);
 298
 299         if (!at91_soc_is_detected())
 300                 panic("AT91: Impossible to detect the SOC type");
 301
 302         pr_info("AT91: Detected soc type: %s\n",
 303                 at91_get_soc_type(&at91_soc_initdata));
 304         if (at91_soc_initdata.subtype != AT91_SOC_SUBTYPE_NONE)
 305                 pr_info("AT91: Detected soc subtype: %s\n",
 306                         at91_get_soc_subtype(&at91_soc_initdata));
 307
 308         if (!at91_soc_is_enabled())
 309                 panic("AT91: Soc not enabled");
 310
 311         if (at91_boot_soc.map_io)
 312                 at91_boot_soc.map_io();
 313 }
 314
 315 void __iomem *at91_shdwc_base = NULL;
 316
 317 static void at91sam9_poweroff(void)
 318 {
 319         at91_shdwc_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 320 }
 321
 322 void __init at91_ioremap_shdwc(u32 base_addr)
 323 {
 324         at91_shdwc_base = ioremap(base_addr, 16);
 325         if (!at91_shdwc_base)
 326                 panic("Impossible to ioremap at91_shdwc_base\n");
 327         pm_power_off = at91sam9_poweroff;
 328 }
 329
 330 void __iomem *at91_rstc_base;
 331
 332 void __init at91_ioremap_rstc(u32 base_addr)
 333 {
 334         at91_rstc_base = ioremap(base_addr, 16);
 335         if (!at91_rstc_base)
 336                 panic("Impossible to ioremap at91_rstc_base\n");
 337 }
 338
 339 void __iomem *at91_matrix_base;
 340 EXPORT_SYMBOL_GPL(at91_matrix_base);
 341
 342 void __init at91_ioremap_matrix(u32 base_addr)
 343 {
 344         at91_matrix_base = ioremap(base_addr, 512);
 345         if (!at91_matrix_base)
 346                 panic("Impossible to ioremap at91_matrix_base\n");
 347 }
 348
 349 #if defined(CONFIG_OF)
 350 static struct of_device_id rstc_ids[] = {
 351         { .compatible = "atmel,at91sam9260-rstc", .data = at91sam9_alt_restart },
 352         { .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
 353         { /*sentinel*/ }
 354 };
 355
 356 static void at91_dt_rstc(void)
 357 {
 358         struct device_node *np;
 359         const struct of_device_id *of_id;
 360
 361         np = of_find_matching_node(NULL, rstc_ids);
 362         if (!np)
 363                 panic("unable to find compatible rstc node in dtb\n");
 364
 365         at91_rstc_base = of_iomap(np, 0);
 366         if (!at91_rstc_base)
 367                 panic("unable to map rstc cpu registers\n");
 368
 369         of_id = of_match_node(rstc_ids, np);
 370         if (!of_id)
 371                 panic("AT91: rtsc no restart function available\n");
 372
 373         arm_pm_restart = of_id->data;
 374
 375         of_node_put(np);
 376 }
 377
 378 static struct of_device_id ramc_ids[] = {
 379         { .compatible = "atmel,at91rm9200-sdramc" },
 380         { .compatible = "atmel,at91sam9260-sdramc" },
 381         { .compatible = "atmel,at91sam9g45-ddramc" },
 382         { /*sentinel*/ }
 383 };
 384
 385 static void at91_dt_ramc(void)
 386 {
 387         struct device_node *np;
 388
 389         np = of_find_matching_node(NULL, ramc_ids);
 390         if (!np)
 391                 panic("unable to find compatible ram controller node in dtb\n");
 392
 393         at91_ramc_base[0] = of_iomap(np, 0);
 394         if (!at91_ramc_base[0])
 395                 panic("unable to map ramc[0] cpu registers\n");
 396         /* the controller may have 2 banks */
 397         at91_ramc_base[1] = of_iomap(np, 1);
 398
 399         of_node_put(np);
 400 }
 401
 402 static struct of_device_id shdwc_ids[] = {
 403         { .compatible = "atmel,at91sam9260-shdwc", },
 404         { .compatible = "atmel,at91sam9rl-shdwc", },
 405         { .compatible = "atmel,at91sam9x5-shdwc", },
 406         { /*sentinel*/ }
 407 };
 408
 409 static const char *shdwc_wakeup_modes[] = {
 410         [AT91_SHDW_WKMODE0_NONE]        = "none",
 411         [AT91_SHDW_WKMODE0_HIGH]        = "high",
 412         [AT91_SHDW_WKMODE0_LOW]         = "low",
 413         [AT91_SHDW_WKMODE0_ANYLEVEL]    = "any",
 414 };
 415
 416 const int at91_dtget_shdwc_wakeup_mode(struct device_node *np)
 417 {
 418         const char *pm;
 419         int err, i;
 420
 421         err = of_property_read_string(np, "atmel,wakeup-mode", &pm);
 422         if (err < 0)
 423                 return AT91_SHDW_WKMODE0_ANYLEVEL;
 424
 425         for (i = 0; i < ARRAY_SIZE(shdwc_wakeup_modes); i++)
 426                 if (!strcasecmp(pm, shdwc_wakeup_modes[i]))
 427                         return i;
 428
 429         return -ENODEV;
 430 }
 431
 432 static void at91_dt_shdwc(void)
 433 {
 434         struct device_node *np;
 435         int wakeup_mode;
 436         u32 reg;
 437         u32 mode = 0;
 438
 439         np = of_find_matching_node(NULL, shdwc_ids);
 440         if (!np) {
 441                 pr_debug("AT91: unable to find compatible shutdown (shdwc) controller node in dtb\n");
 442                 return;
 443         }
 444
 445         at91_shdwc_base = of_iomap(np, 0);
 446         if (!at91_shdwc_base)
 447                 panic("AT91: unable to map shdwc cpu registers\n");
 448
 449         wakeup_mode = at91_dtget_shdwc_wakeup_mode(np);
 450         if (wakeup_mode < 0) {
 451                 pr_warn("AT91: shdwc unknown wakeup mode\n");
 452                 goto end;
 453         }
 454
 455         if (!of_property_read_u32(np, "atmel,wakeup-counter", &reg)) {
 456                 if (reg > AT91_SHDW_CPTWK0_MAX) {
 457                         pr_warn("AT91: shdwc wakeup counter 0x%x > 0x%x reduce it to 0x%x\n",
 458                                 reg, AT91_SHDW_CPTWK0_MAX, AT91_SHDW_CPTWK0_MAX);
 459                         reg = AT91_SHDW_CPTWK0_MAX;
 460                 }
 461                 mode |= AT91_SHDW_CPTWK0_(reg);
 462         }
 463
 464         if (of_property_read_bool(np, "atmel,wakeup-rtc-timer"))
 465                         mode |= AT91_SHDW_RTCWKEN;
 466
 467         if (of_property_read_bool(np, "atmel,wakeup-rtt-timer"))
 468                         mode |= AT91_SHDW_RTTWKEN;
 469
 470         at91_shdwc_write(AT91_SHDW_MR, wakeup_mode | mode);
 471
 472 end:
 473         pm_power_off = at91sam9_poweroff;
 474
 475         of_node_put(np);
 476 }
 477
 478 void __init at91rm9200_dt_initialize(void)
 479 {
 480         at91_dt_ramc();
 481
 482         /* Init clock subsystem */
 483         at91_dt_clock_init();
 484
 485         /* Register the processor-specific clocks */
 486         at91_boot_soc.register_clocks();
 487
 488         at91_boot_soc.init();
 489 }
 490
 491 void __init at91_dt_initialize(void)
 492 {
 493         at91_dt_rstc();
 494         at91_dt_ramc();
 495         at91_dt_shdwc();
 496
 497         /* Init clock subsystem */
 498         at91_dt_clock_init();
 499
 500         /* Register the processor-specific clocks */
 501         at91_boot_soc.register_clocks();
 502
 503         if (at91_boot_soc.init)
 504                 at91_boot_soc.init();
 505 }
 506 #endif
 507
 508 void __init at91_initialize(unsigned long main_clock)
 509 {
 510         at91_boot_soc.ioremap_registers();
 511
 512         /* Init clock subsystem */
 513         at91_clock_init(main_clock);
 514
 515         /* Register the processor-specific clocks */
 516         at91_boot_soc.register_clocks();
 517
 518         at91_boot_soc.init();
 519
 520         pinctrl_provide_dummies();
 521 }