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
  14 #include <asm/system_misc.h>
  15 #include <asm/mach/map.h>
  16
  17 #include <mach/hardware.h>
  18 #include <mach/cpu.h>
  19 #include <mach/at91_dbgu.h>
  20 #include <mach/at91_pmc.h>
  21 #include <mach/at91_shdwc.h>
  22
  23 #include "soc.h"
  24 #include "generic.h"
  25
  26 struct at91_init_soc __initdata at91_boot_soc;
  27
  28 struct at91_socinfo at91_soc_initdata;
  29 EXPORT_SYMBOL(at91_soc_initdata);
  30
  31 void __init at91rm9200_set_type(int type)
  32 {
  33         if (type == ARCH_REVISON_9200_PQFP)
  34                 at91_soc_initdata.subtype = AT91_SOC_RM9200_PQFP;
  35         else
  36                 at91_soc_initdata.subtype = AT91_SOC_RM9200_BGA;
  37
  38         pr_info("AT91: filled in soc subtype: %s\n",
  39                 at91_get_soc_subtype(&at91_soc_initdata));
  40 }
  41
  42 void __init at91_init_irq_default(void)
  43 {
  44         at91_init_interrupts(at91_boot_soc.default_irq_priority);
  45 }
  46
  47 void __init at91_init_interrupts(unsigned int *priority)
  48 {
  49         /* Initialize the AIC interrupt controller */
  50         at91_aic_init(priority, at91_extern_irq);
  51
  52         /* Enable GPIO interrupts */
  53         at91_gpio_irq_setup();
  54 }
  55
  56 void __iomem *at91_ramc_base[2];
  57 EXPORT_SYMBOL_GPL(at91_ramc_base);
  58
  59 void __init at91_ioremap_ramc(int id, u32 addr, u32 size)
  60 {
  61         if (id < 0 || id > 1) {
  62                 pr_emerg("Wrong RAM controller id (%d), cannot continue\n", id);
  63                 BUG();
  64         }
  65         at91_ramc_base[id] = ioremap(addr, size);
  66         if (!at91_ramc_base[id])
  67                 panic("Impossible to ioremap ramc.%d 0x%x\n", id, addr);
  68 }
  69
  70 static struct map_desc sram_desc[2] __initdata;
  71
  72 void __init at91_init_sram(int bank, unsigned long base, unsigned int length)
  73 {
  74         struct map_desc *desc = &sram_desc[bank];
  75
  76         desc->virtual = (unsigned long)AT91_IO_VIRT_BASE - length;
  77         if (bank > 0)
  78                 desc->virtual -= sram_desc[bank - 1].length;
  79
  80         desc->pfn = __phys_to_pfn(base);
  81         desc->length = length;
  82         desc->type = MT_DEVICE;
  83
  84         pr_info("AT91: sram at 0x%lx of 0x%x mapped at 0x%lx\n",
  85                 base, length, desc->virtual);
  86
  87         iotable_init(desc, 1);
  88 }
  89
  90 static struct map_desc at91_io_desc __initdata __maybe_unused = {
  91         .virtual        = (unsigned long)AT91_VA_BASE_SYS,
  92         .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  93         .length         = SZ_16K,
  94         .type           = MT_DEVICE,
  95 };
  96
  97 static void __init soc_detect(u32 dbgu_base)
  98 {
  99         u32 cidr, socid;
 100
 101         cidr = __raw_readl(AT91_IO_P2V(dbgu_base) + AT91_DBGU_CIDR);
 102         socid = cidr & ~AT91_CIDR_VERSION;
 103
 104         switch (socid) {
 105         case ARCH_ID_AT91RM9200:
 106                 at91_soc_initdata.type = AT91_SOC_RM9200;
 107                 at91_boot_soc = at91rm9200_soc;
 108                 break;
 109
 110         case ARCH_ID_AT91SAM9260:
 111                 at91_soc_initdata.type = AT91_SOC_SAM9260;
 112                 at91_boot_soc = at91sam9260_soc;
 113                 break;
 114
 115         case ARCH_ID_AT91SAM9261:
 116                 at91_soc_initdata.type = AT91_SOC_SAM9261;
 117                 at91_boot_soc = at91sam9261_soc;
 118                 break;
 119
 120         case ARCH_ID_AT91SAM9263:
 121                 at91_soc_initdata.type = AT91_SOC_SAM9263;
 122                 at91_boot_soc = at91sam9263_soc;
 123                 break;
 124
 125         case ARCH_ID_AT91SAM9G20:
 126                 at91_soc_initdata.type = AT91_SOC_SAM9G20;
 127                 at91_boot_soc = at91sam9260_soc;
 128                 break;
 129
 130         case ARCH_ID_AT91SAM9G45:
 131                 at91_soc_initdata.type = AT91_SOC_SAM9G45;
 132                 if (cidr == ARCH_ID_AT91SAM9G45ES)
 133                         at91_soc_initdata.subtype = AT91_SOC_SAM9G45ES;
 134                 at91_boot_soc = at91sam9g45_soc;
 135                 break;
 136
 137         case ARCH_ID_AT91SAM9RL64:
 138                 at91_soc_initdata.type = AT91_SOC_SAM9RL;
 139                 at91_boot_soc = at91sam9rl_soc;
 140                 break;
 141
 142         case ARCH_ID_AT91SAM9X5:
 143                 at91_soc_initdata.type = AT91_SOC_SAM9X5;
 144                 at91_boot_soc = at91sam9x5_soc;
 145                 break;
 146
 147         case ARCH_ID_AT91SAM9N12:
 148                 at91_soc_initdata.type = AT91_SOC_SAM9N12;
 149                 at91_boot_soc = at91sam9n12_soc;
 150                 break;
 151         }
 152
 153         /* at91sam9g10 */
 154         if ((socid & ~AT91_CIDR_EXT) == ARCH_ID_AT91SAM9G10) {
 155                 at91_soc_initdata.type = AT91_SOC_SAM9G10;
 156                 at91_boot_soc = at91sam9261_soc;
 157         }
 158         /* at91sam9xe */
 159         else if ((cidr & AT91_CIDR_ARCH) == ARCH_FAMILY_AT91SAM9XE) {
 160                 at91_soc_initdata.type = AT91_SOC_SAM9260;
 161                 at91_soc_initdata.subtype = AT91_SOC_SAM9XE;
 162                 at91_boot_soc = at91sam9260_soc;
 163         }
 164
 165         if (!at91_soc_is_detected())
 166                 return;
 167
 168         at91_soc_initdata.cidr = cidr;
 169
 170         /* sub version of soc */
 171         at91_soc_initdata.exid = __raw_readl(AT91_IO_P2V(dbgu_base) + AT91_DBGU_EXID);
 172
 173         if (at91_soc_initdata.type == AT91_SOC_SAM9G45) {
 174                 switch (at91_soc_initdata.exid) {
 175                 case ARCH_EXID_AT91SAM9M10:
 176                         at91_soc_initdata.subtype = AT91_SOC_SAM9M10;
 177                         break;
 178                 case ARCH_EXID_AT91SAM9G46:
 179                         at91_soc_initdata.subtype = AT91_SOC_SAM9G46;
 180                         break;
 181                 case ARCH_EXID_AT91SAM9M11:
 182                         at91_soc_initdata.subtype = AT91_SOC_SAM9M11;
 183                         break;
 184                 }
 185         }
 186
 187         if (at91_soc_initdata.type == AT91_SOC_SAM9X5) {
 188                 switch (at91_soc_initdata.exid) {
 189                 case ARCH_EXID_AT91SAM9G15:
 190                         at91_soc_initdata.subtype = AT91_SOC_SAM9G15;
 191                         break;
 192                 case ARCH_EXID_AT91SAM9G35:
 193                         at91_soc_initdata.subtype = AT91_SOC_SAM9G35;
 194                         break;
 195                 case ARCH_EXID_AT91SAM9X35:
 196                         at91_soc_initdata.subtype = AT91_SOC_SAM9X35;
 197                         break;
 198                 case ARCH_EXID_AT91SAM9G25:
 199                         at91_soc_initdata.subtype = AT91_SOC_SAM9G25;
 200                         break;
 201                 case ARCH_EXID_AT91SAM9X25:
 202                         at91_soc_initdata.subtype = AT91_SOC_SAM9X25;
 203                         break;
 204                 }
 205         }
 206 }
 207
 208 static const char *soc_name[] = {
 209         [AT91_SOC_RM9200]       = "at91rm9200",
 210         [AT91_SOC_SAM9260]      = "at91sam9260",
 211         [AT91_SOC_SAM9261]      = "at91sam9261",
 212         [AT91_SOC_SAM9263]      = "at91sam9263",
 213         [AT91_SOC_SAM9G10]      = "at91sam9g10",
 214         [AT91_SOC_SAM9G20]      = "at91sam9g20",
 215         [AT91_SOC_SAM9G45]      = "at91sam9g45",
 216         [AT91_SOC_SAM9RL]       = "at91sam9rl",
 217         [AT91_SOC_SAM9X5]       = "at91sam9x5",
 218         [AT91_SOC_SAM9N12]      = "at91sam9n12",
 219         [AT91_SOC_NONE]         = "Unknown"
 220 };
 221
 222 const char *at91_get_soc_type(struct at91_socinfo *c)
 223 {
 224         return soc_name[c->type];
 225 }
 226 EXPORT_SYMBOL(at91_get_soc_type);
 227
 228 static const char *soc_subtype_name[] = {
 229         [AT91_SOC_RM9200_BGA]   = "at91rm9200 BGA",
 230         [AT91_SOC_RM9200_PQFP]  = "at91rm9200 PQFP",
 231         [AT91_SOC_SAM9XE]       = "at91sam9xe",
 232         [AT91_SOC_SAM9G45ES]    = "at91sam9g45es",
 233         [AT91_SOC_SAM9M10]      = "at91sam9m10",
 234         [AT91_SOC_SAM9G46]      = "at91sam9g46",
 235         [AT91_SOC_SAM9M11]      = "at91sam9m11",
 236         [AT91_SOC_SAM9G15]      = "at91sam9g15",
 237         [AT91_SOC_SAM9G35]      = "at91sam9g35",
 238         [AT91_SOC_SAM9X35]      = "at91sam9x35",
 239         [AT91_SOC_SAM9G25]      = "at91sam9g25",
 240         [AT91_SOC_SAM9X25]      = "at91sam9x25",
 241         [AT91_SOC_SUBTYPE_NONE] = "Unknown"
 242 };
 243
 244 const char *at91_get_soc_subtype(struct at91_socinfo *c)
 245 {
 246         return soc_subtype_name[c->subtype];
 247 }
 248 EXPORT_SYMBOL(at91_get_soc_subtype);
 249
 250 void __init at91_map_io(void)
 251 {
 252         /* Map peripherals */
 253         iotable_init(&at91_io_desc, 1);
 254
 255         at91_soc_initdata.type = AT91_SOC_NONE;
 256         at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
 257
 258         soc_detect(AT91_BASE_DBGU0);
 259         if (!at91_soc_is_detected())
 260                 soc_detect(AT91_BASE_DBGU1);
 261
 262         if (!at91_soc_is_detected())
 263                 panic("AT91: Impossible to detect the SOC type");
 264
 265         pr_info("AT91: Detected soc type: %s\n",
 266                 at91_get_soc_type(&at91_soc_initdata));
 267         pr_info("AT91: Detected soc subtype: %s\n",
 268                 at91_get_soc_subtype(&at91_soc_initdata));
 269
 270         if (!at91_soc_is_enabled())
 271                 panic("AT91: Soc not enabled");
 272
 273         if (at91_boot_soc.map_io)
 274                 at91_boot_soc.map_io();
 275 }
 276
 277 void __iomem *at91_shdwc_base = NULL;
 278
 279 static void at91sam9_poweroff(void)
 280 {
 281         at91_shdwc_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 282 }
 283
 284 void __init at91_ioremap_shdwc(u32 base_addr)
 285 {
 286         at91_shdwc_base = ioremap(base_addr, 16);
 287         if (!at91_shdwc_base)
 288                 panic("Impossible to ioremap at91_shdwc_base\n");
 289         pm_power_off = at91sam9_poweroff;
 290 }
 291
 292 void __iomem *at91_rstc_base;
 293
 294 void __init at91_ioremap_rstc(u32 base_addr)
 295 {
 296         at91_rstc_base = ioremap(base_addr, 16);
 297         if (!at91_rstc_base)
 298                 panic("Impossible to ioremap at91_rstc_base\n");
 299 }
 300
 301 void __iomem *at91_matrix_base;
 302 EXPORT_SYMBOL_GPL(at91_matrix_base);
 303
 304 void __init at91_ioremap_matrix(u32 base_addr)
 305 {
 306         at91_matrix_base = ioremap(base_addr, 512);
 307         if (!at91_matrix_base)
 308                 panic("Impossible to ioremap at91_matrix_base\n");
 309 }
 310
 311 #if defined(CONFIG_OF)
 312 static struct of_device_id rstc_ids[] = {
 313         { .compatible = "atmel,at91sam9260-rstc", .data = at91sam9_alt_restart },
 314         { .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
 315         { /*sentinel*/ }
 316 };
 317
 318 static void at91_dt_rstc(void)
 319 {
 320         struct device_node *np;
 321         const struct of_device_id *of_id;
 322
 323         np = of_find_matching_node(NULL, rstc_ids);
 324         if (!np)
 325                 panic("unable to find compatible rstc node in dtb\n");
 326
 327         at91_rstc_base = of_iomap(np, 0);
 328         if (!at91_rstc_base)
 329                 panic("unable to map rstc cpu registers\n");
 330
 331         of_id = of_match_node(rstc_ids, np);
 332         if (!of_id)
 333                 panic("AT91: rtsc no restart function availlable\n");
 334
 335         arm_pm_restart = of_id->data;
 336
 337         of_node_put(np);
 338 }
 339
 340 static struct of_device_id ramc_ids[] = {
 341         { .compatible = "atmel,at91sam9260-sdramc" },
 342         { .compatible = "atmel,at91sam9g45-ddramc" },
 343         { /*sentinel*/ }
 344 };
 345
 346 static void at91_dt_ramc(void)
 347 {
 348         struct device_node *np;
 349
 350         np = of_find_matching_node(NULL, ramc_ids);
 351         if (!np)
 352                 panic("unable to find compatible ram conroller node in dtb\n");
 353
 354         at91_ramc_base[0] = of_iomap(np, 0);
 355         if (!at91_ramc_base[0])
 356                 panic("unable to map ramc[0] cpu registers\n");
 357         /* the controller may have 2 banks */
 358         at91_ramc_base[1] = of_iomap(np, 1);
 359
 360         of_node_put(np);
 361 }
 362
 363 static struct of_device_id shdwc_ids[] = {
 364         { .compatible = "atmel,at91sam9260-shdwc", },
 365         { .compatible = "atmel,at91sam9rl-shdwc", },
 366         { .compatible = "atmel,at91sam9x5-shdwc", },
 367         { /*sentinel*/ }
 368 };
 369
 370 static const char *shdwc_wakeup_modes[] = {
 371         [AT91_SHDW_WKMODE0_NONE]        = "none",
 372         [AT91_SHDW_WKMODE0_HIGH]        = "high",
 373         [AT91_SHDW_WKMODE0_LOW]         = "low",
 374         [AT91_SHDW_WKMODE0_ANYLEVEL]    = "any",
 375 };
 376
 377 const int at91_dtget_shdwc_wakeup_mode(struct device_node *np)
 378 {
 379         const char *pm;
 380         int err, i;
 381
 382         err = of_property_read_string(np, "atmel,wakeup-mode", &pm);
 383         if (err < 0)
 384                 return AT91_SHDW_WKMODE0_ANYLEVEL;
 385
 386         for (i = 0; i < ARRAY_SIZE(shdwc_wakeup_modes); i++)
 387                 if (!strcasecmp(pm, shdwc_wakeup_modes[i]))
 388                         return i;
 389
 390         return -ENODEV;
 391 }
 392
 393 static void at91_dt_shdwc(void)
 394 {
 395         struct device_node *np;
 396         int wakeup_mode;
 397         u32 reg;
 398         u32 mode = 0;
 399
 400         np = of_find_matching_node(NULL, shdwc_ids);
 401         if (!np) {
 402                 pr_debug("AT91: unable to find compatible shutdown (shdwc) conroller node in dtb\n");
 403                 return;
 404         }
 405
 406         at91_shdwc_base = of_iomap(np, 0);
 407         if (!at91_shdwc_base)
 408                 panic("AT91: unable to map shdwc cpu registers\n");
 409
 410         wakeup_mode = at91_dtget_shdwc_wakeup_mode(np);
 411         if (wakeup_mode < 0) {
 412                 pr_warn("AT91: shdwc unknown wakeup mode\n");
 413                 goto end;
 414         }
 415
 416         if (!of_property_read_u32(np, "atmel,wakeup-counter", &reg)) {
 417                 if (reg > AT91_SHDW_CPTWK0_MAX) {
 418                         pr_warn("AT91: shdwc wakeup conter 0x%x > 0x%x reduce it to 0x%x\n",
 419                                 reg, AT91_SHDW_CPTWK0_MAX, AT91_SHDW_CPTWK0_MAX);
 420                         reg = AT91_SHDW_CPTWK0_MAX;
 421                 }
 422                 mode |= AT91_SHDW_CPTWK0_(reg);
 423         }
 424
 425         if (of_property_read_bool(np, "atmel,wakeup-rtc-timer"))
 426                         mode |= AT91_SHDW_RTCWKEN;
 427
 428         if (of_property_read_bool(np, "atmel,wakeup-rtt-timer"))
 429                         mode |= AT91_SHDW_RTTWKEN;
 430
 431         at91_shdwc_write(AT91_SHDW_MR, wakeup_mode | mode);
 432
 433 end:
 434         pm_power_off = at91sam9_poweroff;
 435
 436         of_node_put(np);
 437 }
 438
 439 void __init at91_dt_initialize(void)
 440 {
 441         at91_dt_rstc();
 442         at91_dt_ramc();
 443         at91_dt_shdwc();
 444
 445         /* Init clock subsystem */
 446         at91_dt_clock_init();
 447
 448         /* Register the processor-specific clocks */
 449         at91_boot_soc.register_clocks();
 450
 451         at91_boot_soc.init();
 452 }
 453 #endif
 454
 455 void __init at91_initialize(unsigned long main_clock)
 456 {
 457         at91_boot_soc.ioremap_registers();
 458
 459         /* Init clock subsystem */
 460         at91_clock_init(main_clock);
 461
 462         /* Register the processor-specific clocks */
 463         at91_boot_soc.register_clocks();
 464
 465         at91_boot_soc.init();
 466 }