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);
  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 = 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 = {
  91         .virtual        = 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
 148         /* at91sam9g10 */
 149         if ((cidr & ~AT91_CIDR_EXT) == ARCH_ID_AT91SAM9G10) {
 150                 at91_soc_initdata.type = AT91_SOC_SAM9G10;
 151                 at91_boot_soc = at91sam9261_soc;
 152         }
 153         /* at91sam9xe */
 154         else if ((cidr & AT91_CIDR_ARCH) == ARCH_FAMILY_AT91SAM9XE) {
 155                 at91_soc_initdata.type = AT91_SOC_SAM9260;
 156                 at91_soc_initdata.subtype = AT91_SOC_SAM9XE;
 157                 at91_boot_soc = at91sam9260_soc;
 158         }
 159
 160         if (!at91_soc_is_detected())
 161                 return;
 162
 163         at91_soc_initdata.cidr = cidr;
 164
 165         /* sub version of soc */
 166         at91_soc_initdata.exid = __raw_readl(AT91_IO_P2V(dbgu_base) + AT91_DBGU_EXID);
 167
 168         if (at91_soc_initdata.type == AT91_SOC_SAM9G45) {
 169                 switch (at91_soc_initdata.exid) {
 170                 case ARCH_EXID_AT91SAM9M10:
 171                         at91_soc_initdata.subtype = AT91_SOC_SAM9M10;
 172                         break;
 173                 case ARCH_EXID_AT91SAM9G46:
 174                         at91_soc_initdata.subtype = AT91_SOC_SAM9G46;
 175                         break;
 176                 case ARCH_EXID_AT91SAM9M11:
 177                         at91_soc_initdata.subtype = AT91_SOC_SAM9M11;
 178                         break;
 179                 }
 180         }
 181
 182         if (at91_soc_initdata.type == AT91_SOC_SAM9X5) {
 183                 switch (at91_soc_initdata.exid) {
 184                 case ARCH_EXID_AT91SAM9G15:
 185                         at91_soc_initdata.subtype = AT91_SOC_SAM9G15;
 186                         break;
 187                 case ARCH_EXID_AT91SAM9G35:
 188                         at91_soc_initdata.subtype = AT91_SOC_SAM9G35;
 189                         break;
 190                 case ARCH_EXID_AT91SAM9X35:
 191                         at91_soc_initdata.subtype = AT91_SOC_SAM9X35;
 192                         break;
 193                 case ARCH_EXID_AT91SAM9G25:
 194                         at91_soc_initdata.subtype = AT91_SOC_SAM9G25;
 195                         break;
 196                 case ARCH_EXID_AT91SAM9X25:
 197                         at91_soc_initdata.subtype = AT91_SOC_SAM9X25;
 198                         break;
 199                 }
 200         }
 201 }
 202
 203 static const char *soc_name[] = {
 204         [AT91_SOC_RM9200]       = "at91rm9200",
 205         [AT91_SOC_SAM9260]      = "at91sam9260",
 206         [AT91_SOC_SAM9261]      = "at91sam9261",
 207         [AT91_SOC_SAM9263]      = "at91sam9263",
 208         [AT91_SOC_SAM9G10]      = "at91sam9g10",
 209         [AT91_SOC_SAM9G20]      = "at91sam9g20",
 210         [AT91_SOC_SAM9G45]      = "at91sam9g45",
 211         [AT91_SOC_SAM9RL]       = "at91sam9rl",
 212         [AT91_SOC_SAM9X5]       = "at91sam9x5",
 213         [AT91_SOC_NONE]         = "Unknown"
 214 };
 215
 216 const char *at91_get_soc_type(struct at91_socinfo *c)
 217 {
 218         return soc_name[c->type];
 219 }
 220 EXPORT_SYMBOL(at91_get_soc_type);
 221
 222 static const char *soc_subtype_name[] = {
 223         [AT91_SOC_RM9200_BGA]   = "at91rm9200 BGA",
 224         [AT91_SOC_RM9200_PQFP]  = "at91rm9200 PQFP",
 225         [AT91_SOC_SAM9XE]       = "at91sam9xe",
 226         [AT91_SOC_SAM9G45ES]    = "at91sam9g45es",
 227         [AT91_SOC_SAM9M10]      = "at91sam9m10",
 228         [AT91_SOC_SAM9G46]      = "at91sam9g46",
 229         [AT91_SOC_SAM9M11]      = "at91sam9m11",
 230         [AT91_SOC_SAM9G15]      = "at91sam9g15",
 231         [AT91_SOC_SAM9G35]      = "at91sam9g35",
 232         [AT91_SOC_SAM9X35]      = "at91sam9x35",
 233         [AT91_SOC_SAM9G25]      = "at91sam9g25",
 234         [AT91_SOC_SAM9X25]      = "at91sam9x25",
 235         [AT91_SOC_SUBTYPE_NONE] = "Unknown"
 236 };
 237
 238 const char *at91_get_soc_subtype(struct at91_socinfo *c)
 239 {
 240         return soc_subtype_name[c->subtype];
 241 }
 242 EXPORT_SYMBOL(at91_get_soc_subtype);
 243
 244 void __init at91_map_io(void)
 245 {
 246         /* Map peripherals */
 247         iotable_init(&at91_io_desc, 1);
 248
 249         at91_soc_initdata.type = AT91_SOC_NONE;
 250         at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
 251
 252         soc_detect(AT91_BASE_DBGU0);
 253         if (!at91_soc_is_detected())
 254                 soc_detect(AT91_BASE_DBGU1);
 255
 256         if (!at91_soc_is_detected())
 257                 panic("AT91: Impossible to detect the SOC type");
 258
 259         pr_info("AT91: Detected soc type: %s\n",
 260                 at91_get_soc_type(&at91_soc_initdata));
 261         pr_info("AT91: Detected soc subtype: %s\n",
 262                 at91_get_soc_subtype(&at91_soc_initdata));
 263
 264         if (!at91_soc_is_enabled())
 265                 panic("AT91: Soc not enabled");
 266
 267         if (at91_boot_soc.map_io)
 268                 at91_boot_soc.map_io();
 269 }
 270
 271 void __iomem *at91_shdwc_base = NULL;
 272
 273 static void at91sam9_poweroff(void)
 274 {
 275         at91_shdwc_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 276 }
 277
 278 void __init at91_ioremap_shdwc(u32 base_addr)
 279 {
 280         at91_shdwc_base = ioremap(base_addr, 16);
 281         if (!at91_shdwc_base)
 282                 panic("Impossible to ioremap at91_shdwc_base\n");
 283         pm_power_off = at91sam9_poweroff;
 284 }
 285
 286 void __iomem *at91_rstc_base;
 287
 288 void __init at91_ioremap_rstc(u32 base_addr)
 289 {
 290         at91_rstc_base = ioremap(base_addr, 16);
 291         if (!at91_rstc_base)
 292                 panic("Impossible to ioremap at91_rstc_base\n");
 293 }
 294
 295 void __iomem *at91_matrix_base;
 296 EXPORT_SYMBOL_GPL(at91_matrix_base);
 297
 298 void __init at91_ioremap_matrix(u32 base_addr)
 299 {
 300         at91_matrix_base = ioremap(base_addr, 512);
 301         if (!at91_matrix_base)
 302                 panic("Impossible to ioremap at91_matrix_base\n");
 303 }
 304
 305 #if defined(CONFIG_OF)
 306 static struct of_device_id rstc_ids[] = {
 307         { .compatible = "atmel,at91sam9260-rstc", .data = at91sam9_alt_restart },
 308         { .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
 309         { /*sentinel*/ }
 310 };
 311
 312 static void at91_dt_rstc(void)
 313 {
 314         struct device_node *np;
 315         const struct of_device_id *of_id;
 316
 317         np = of_find_matching_node(NULL, rstc_ids);
 318         if (!np)
 319                 panic("unable to find compatible rstc node in dtb\n");
 320
 321         at91_rstc_base = of_iomap(np, 0);
 322         if (!at91_rstc_base)
 323                 panic("unable to map rstc cpu registers\n");
 324
 325         of_id = of_match_node(rstc_ids, np);
 326         if (!of_id)
 327                 panic("AT91: rtsc no restart function availlable\n");
 328
 329         arm_pm_restart = of_id->data;
 330
 331         of_node_put(np);
 332 }
 333
 334 static struct of_device_id ramc_ids[] = {
 335         { .compatible = "atmel,at91sam9260-sdramc" },
 336         { .compatible = "atmel,at91sam9g45-ddramc" },
 337         { /*sentinel*/ }
 338 };
 339
 340 static void at91_dt_ramc(void)
 341 {
 342         struct device_node *np;
 343
 344         np = of_find_matching_node(NULL, ramc_ids);
 345         if (!np)
 346                 panic("unable to find compatible ram conroller node in dtb\n");
 347
 348         at91_ramc_base[0] = of_iomap(np, 0);
 349         if (!at91_ramc_base[0])
 350                 panic("unable to map ramc[0] cpu registers\n");
 351         /* the controller may have 2 banks */
 352         at91_ramc_base[1] = of_iomap(np, 1);
 353
 354         of_node_put(np);
 355 }
 356
 357 static struct of_device_id shdwc_ids[] = {
 358         { .compatible = "atmel,at91sam9260-shdwc", },
 359         { .compatible = "atmel,at91sam9rl-shdwc", },
 360         { .compatible = "atmel,at91sam9x5-shdwc", },
 361         { /*sentinel*/ }
 362 };
 363
 364 static const char *shdwc_wakeup_modes[] = {
 365         [AT91_SHDW_WKMODE0_NONE]        = "none",
 366         [AT91_SHDW_WKMODE0_HIGH]        = "high",
 367         [AT91_SHDW_WKMODE0_LOW]         = "low",
 368         [AT91_SHDW_WKMODE0_ANYLEVEL]    = "any",
 369 };
 370
 371 const int at91_dtget_shdwc_wakeup_mode(struct device_node *np)
 372 {
 373         const char *pm;
 374         int err, i;
 375
 376         err = of_property_read_string(np, "atmel,wakeup-mode", &pm);
 377         if (err < 0)
 378                 return AT91_SHDW_WKMODE0_ANYLEVEL;
 379
 380         for (i = 0; i < ARRAY_SIZE(shdwc_wakeup_modes); i++)
 381                 if (!strcasecmp(pm, shdwc_wakeup_modes[i]))
 382                         return i;
 383
 384         return -ENODEV;
 385 }
 386
 387 static void at91_dt_shdwc(void)
 388 {
 389         struct device_node *np;
 390         int wakeup_mode;
 391         u32 reg;
 392         u32 mode = 0;
 393
 394         np = of_find_matching_node(NULL, shdwc_ids);
 395         if (!np) {
 396                 pr_debug("AT91: unable to find compatible shutdown (shdwc) conroller node in dtb\n");
 397                 return;
 398         }
 399
 400         at91_shdwc_base = of_iomap(np, 0);
 401         if (!at91_shdwc_base)
 402                 panic("AT91: unable to map shdwc cpu registers\n");
 403
 404         wakeup_mode = at91_dtget_shdwc_wakeup_mode(np);
 405         if (wakeup_mode < 0) {
 406                 pr_warn("AT91: shdwc unknown wakeup mode\n");
 407                 goto end;
 408         }
 409
 410         if (!of_property_read_u32(np, "atmel,wakeup-counter", &reg)) {
 411                 if (reg > AT91_SHDW_CPTWK0_MAX) {
 412                         pr_warn("AT91: shdwc wakeup conter 0x%x > 0x%x reduce it to 0x%x\n",
 413                                 reg, AT91_SHDW_CPTWK0_MAX, AT91_SHDW_CPTWK0_MAX);
 414                         reg = AT91_SHDW_CPTWK0_MAX;
 415                 }
 416                 mode |= AT91_SHDW_CPTWK0_(reg);
 417         }
 418
 419         if (of_property_read_bool(np, "atmel,wakeup-rtc-timer"))
 420                         mode |= AT91_SHDW_RTCWKEN;
 421
 422         if (of_property_read_bool(np, "atmel,wakeup-rtt-timer"))
 423                         mode |= AT91_SHDW_RTTWKEN;
 424
 425         at91_shdwc_write(AT91_SHDW_MR, wakeup_mode | mode);
 426
 427 end:
 428         pm_power_off = at91sam9_poweroff;
 429
 430         of_node_put(np);
 431 }
 432
 433 void __init at91_dt_initialize(void)
 434 {
 435         at91_dt_rstc();
 436         at91_dt_ramc();
 437         at91_dt_shdwc();
 438
 439         /* Init clock subsystem */
 440         at91_dt_clock_init();
 441
 442         /* Register the processor-specific clocks */
 443         at91_boot_soc.register_clocks();
 444
 445         at91_boot_soc.init();
 446 }
 447 #endif
 448
 449 void __init at91_initialize(unsigned long main_clock)
 450 {
 451         at91_boot_soc.ioremap_registers();
 452
 453         /* Init clock subsystem */
 454         at91_clock_init(main_clock);
 455
 456         /* Register the processor-specific clocks */
 457         at91_boot_soc.register_clocks();
 458
 459         at91_boot_soc.init();
 460 }