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 #define pr_fmt(fmt)     "AT91: " fmt
   9
  10 #include <linux/module.h>
  11 #include <linux/io.h>
  12 #include <linux/mm.h>
  13 #include <linux/pm.h>
  14 #include <linux/of_address.h>
  15 #include <linux/pinctrl/machine.h>
  16 #include <linux/clk/at91_pmc.h>
  17
  18 #include <asm/system_misc.h>
  19 #include <asm/mach/map.h>
  20
  21 #include <mach/hardware.h>
  22 #include <mach/cpu.h>
  23 #include <mach/at91_dbgu.h>
  24
  25 #include "generic.h"
  26 #include "pm.h"
  27
  28 struct at91_socinfo at91_soc_initdata;
  29 EXPORT_SYMBOL(at91_soc_initdata);
  30
  31 static struct map_desc at91_io_desc __initdata __maybe_unused = {
  32         .virtual        = (unsigned long)AT91_VA_BASE_SYS,
  33         .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  34         .length         = SZ_16K,
  35         .type           = MT_DEVICE,
  36 };
  37
  38 static struct map_desc at91_alt_io_desc __initdata __maybe_unused = {
  39         .virtual        = (unsigned long)AT91_ALT_VA_BASE_SYS,
  40         .pfn            = __phys_to_pfn(AT91_ALT_BASE_SYS),
  41         .length         = 24 * SZ_1K,
  42         .type           = MT_DEVICE,
  43 };
  44
  45 static void __init soc_detect(u32 dbgu_base)
  46 {
  47         u32 cidr, socid;
  48
  49         cidr = __raw_readl(AT91_IO_P2V(dbgu_base) + AT91_DBGU_CIDR);
  50         socid = cidr & ~AT91_CIDR_VERSION;
  51
  52         switch (socid) {
  53         case ARCH_ID_AT91RM9200:
  54                 at91_soc_initdata.type = AT91_SOC_RM9200;
  55                 if (at91_soc_initdata.subtype == AT91_SOC_SUBTYPE_UNKNOWN)
  56                         at91_soc_initdata.subtype = AT91_SOC_RM9200_BGA;
  57                 break;
  58
  59         case ARCH_ID_AT91SAM9260:
  60                 at91_soc_initdata.type = AT91_SOC_SAM9260;
  61                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
  62                 break;
  63
  64         case ARCH_ID_AT91SAM9261:
  65                 at91_soc_initdata.type = AT91_SOC_SAM9261;
  66                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
  67                 break;
  68
  69         case ARCH_ID_AT91SAM9263:
  70                 at91_soc_initdata.type = AT91_SOC_SAM9263;
  71                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
  72                 break;
  73
  74         case ARCH_ID_AT91SAM9G20:
  75                 at91_soc_initdata.type = AT91_SOC_SAM9G20;
  76                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
  77                 break;
  78
  79         case ARCH_ID_AT91SAM9G45:
  80                 at91_soc_initdata.type = AT91_SOC_SAM9G45;
  81                 if (cidr == ARCH_ID_AT91SAM9G45ES)
  82                         at91_soc_initdata.subtype = AT91_SOC_SAM9G45ES;
  83                 break;
  84
  85         case ARCH_ID_AT91SAM9RL64:
  86                 at91_soc_initdata.type = AT91_SOC_SAM9RL;
  87                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
  88                 break;
  89
  90         case ARCH_ID_AT91SAM9X5:
  91                 at91_soc_initdata.type = AT91_SOC_SAM9X5;
  92                 break;
  93
  94         case ARCH_ID_AT91SAM9N12:
  95                 at91_soc_initdata.type = AT91_SOC_SAM9N12;
  96                 break;
  97
  98         case ARCH_ID_SAMA5:
  99                 at91_soc_initdata.exid = __raw_readl(AT91_IO_P2V(dbgu_base) + AT91_DBGU_EXID);
 100                 if (at91_soc_initdata.exid & ARCH_EXID_SAMA5D3) {
 101                         at91_soc_initdata.type = AT91_SOC_SAMA5D3;
 102                 }
 103                 break;
 104         }
 105
 106         /* at91sam9g10 */
 107         if ((socid & ~AT91_CIDR_EXT) == ARCH_ID_AT91SAM9G10) {
 108                 at91_soc_initdata.type = AT91_SOC_SAM9G10;
 109                 at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
 110         }
 111         /* at91sam9xe */
 112         else if ((cidr & AT91_CIDR_ARCH) == ARCH_FAMILY_AT91SAM9XE) {
 113                 at91_soc_initdata.type = AT91_SOC_SAM9260;
 114                 at91_soc_initdata.subtype = AT91_SOC_SAM9XE;
 115         }
 116
 117         if (!at91_soc_is_detected())
 118                 return;
 119
 120         at91_soc_initdata.cidr = cidr;
 121
 122         /* sub version of soc */
 123         if (!at91_soc_initdata.exid)
 124                 at91_soc_initdata.exid = __raw_readl(AT91_IO_P2V(dbgu_base) + AT91_DBGU_EXID);
 125
 126         if (at91_soc_initdata.type == AT91_SOC_SAM9G45) {
 127                 switch (at91_soc_initdata.exid) {
 128                 case ARCH_EXID_AT91SAM9M10:
 129                         at91_soc_initdata.subtype = AT91_SOC_SAM9M10;
 130                         break;
 131                 case ARCH_EXID_AT91SAM9G46:
 132                         at91_soc_initdata.subtype = AT91_SOC_SAM9G46;
 133                         break;
 134                 case ARCH_EXID_AT91SAM9M11:
 135                         at91_soc_initdata.subtype = AT91_SOC_SAM9M11;
 136                         break;
 137                 }
 138         }
 139
 140         if (at91_soc_initdata.type == AT91_SOC_SAM9X5) {
 141                 switch (at91_soc_initdata.exid) {
 142                 case ARCH_EXID_AT91SAM9G15:
 143                         at91_soc_initdata.subtype = AT91_SOC_SAM9G15;
 144                         break;
 145                 case ARCH_EXID_AT91SAM9G35:
 146                         at91_soc_initdata.subtype = AT91_SOC_SAM9G35;
 147                         break;
 148                 case ARCH_EXID_AT91SAM9X35:
 149                         at91_soc_initdata.subtype = AT91_SOC_SAM9X35;
 150                         break;
 151                 case ARCH_EXID_AT91SAM9G25:
 152                         at91_soc_initdata.subtype = AT91_SOC_SAM9G25;
 153                         break;
 154                 case ARCH_EXID_AT91SAM9X25:
 155                         at91_soc_initdata.subtype = AT91_SOC_SAM9X25;
 156                         break;
 157                 }
 158         }
 159
 160         if (at91_soc_initdata.type == AT91_SOC_SAMA5D3) {
 161                 switch (at91_soc_initdata.exid) {
 162                 case ARCH_EXID_SAMA5D31:
 163                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D31;
 164                         break;
 165                 case ARCH_EXID_SAMA5D33:
 166                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D33;
 167                         break;
 168                 case ARCH_EXID_SAMA5D34:
 169                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D34;
 170                         break;
 171                 case ARCH_EXID_SAMA5D35:
 172                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D35;
 173                         break;
 174                 case ARCH_EXID_SAMA5D36:
 175                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D36;
 176                         break;
 177                 }
 178         }
 179 }
 180
 181 static void __init alt_soc_detect(u32 dbgu_base)
 182 {
 183         u32 cidr, socid;
 184
 185         /* SoC ID */
 186         cidr = __raw_readl(AT91_ALT_IO_P2V(dbgu_base) + AT91_DBGU_CIDR);
 187         socid = cidr & ~AT91_CIDR_VERSION;
 188
 189         switch (socid) {
 190         case ARCH_ID_SAMA5:
 191                 at91_soc_initdata.exid = __raw_readl(AT91_ALT_IO_P2V(dbgu_base) + AT91_DBGU_EXID);
 192                 if (at91_soc_initdata.exid & ARCH_EXID_SAMA5D3) {
 193                         at91_soc_initdata.type = AT91_SOC_SAMA5D3;
 194                 } else if (at91_soc_initdata.exid & ARCH_EXID_SAMA5D4) {
 195                         at91_soc_initdata.type = AT91_SOC_SAMA5D4;
 196                 }
 197                 break;
 198         }
 199
 200         if (!at91_soc_is_detected())
 201                 return;
 202
 203         at91_soc_initdata.cidr = cidr;
 204
 205         /* sub version of soc */
 206         if (!at91_soc_initdata.exid)
 207                 at91_soc_initdata.exid = __raw_readl(AT91_ALT_IO_P2V(dbgu_base) + AT91_DBGU_EXID);
 208
 209         if (at91_soc_initdata.type == AT91_SOC_SAMA5D4) {
 210                 switch (at91_soc_initdata.exid) {
 211                 case ARCH_EXID_SAMA5D41:
 212                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D41;
 213                         break;
 214                 case ARCH_EXID_SAMA5D42:
 215                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D42;
 216                         break;
 217                 case ARCH_EXID_SAMA5D43:
 218                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D43;
 219                         break;
 220                 case ARCH_EXID_SAMA5D44:
 221                         at91_soc_initdata.subtype = AT91_SOC_SAMA5D44;
 222                         break;
 223                 }
 224         }
 225 }
 226
 227 static const char *soc_name[] = {
 228         [AT91_SOC_RM9200]       = "at91rm9200",
 229         [AT91_SOC_SAM9260]      = "at91sam9260",
 230         [AT91_SOC_SAM9261]      = "at91sam9261",
 231         [AT91_SOC_SAM9263]      = "at91sam9263",
 232         [AT91_SOC_SAM9G10]      = "at91sam9g10",
 233         [AT91_SOC_SAM9G20]      = "at91sam9g20",
 234         [AT91_SOC_SAM9G45]      = "at91sam9g45",
 235         [AT91_SOC_SAM9RL]       = "at91sam9rl",
 236         [AT91_SOC_SAM9X5]       = "at91sam9x5",
 237         [AT91_SOC_SAM9N12]      = "at91sam9n12",
 238         [AT91_SOC_SAMA5D3]      = "sama5d3",
 239         [AT91_SOC_SAMA5D4]      = "sama5d4",
 240         [AT91_SOC_UNKNOWN]      = "Unknown",
 241 };
 242
 243 const char *at91_get_soc_type(struct at91_socinfo *c)
 244 {
 245         return soc_name[c->type];
 246 }
 247 EXPORT_SYMBOL(at91_get_soc_type);
 248
 249 static const char *soc_subtype_name[] = {
 250         [AT91_SOC_RM9200_BGA]   = "at91rm9200 BGA",
 251         [AT91_SOC_RM9200_PQFP]  = "at91rm9200 PQFP",
 252         [AT91_SOC_SAM9XE]       = "at91sam9xe",
 253         [AT91_SOC_SAM9G45ES]    = "at91sam9g45es",
 254         [AT91_SOC_SAM9M10]      = "at91sam9m10",
 255         [AT91_SOC_SAM9G46]      = "at91sam9g46",
 256         [AT91_SOC_SAM9M11]      = "at91sam9m11",
 257         [AT91_SOC_SAM9G15]      = "at91sam9g15",
 258         [AT91_SOC_SAM9G35]      = "at91sam9g35",
 259         [AT91_SOC_SAM9X35]      = "at91sam9x35",
 260         [AT91_SOC_SAM9G25]      = "at91sam9g25",
 261         [AT91_SOC_SAM9X25]      = "at91sam9x25",
 262         [AT91_SOC_SAMA5D31]     = "sama5d31",
 263         [AT91_SOC_SAMA5D33]     = "sama5d33",
 264         [AT91_SOC_SAMA5D34]     = "sama5d34",
 265         [AT91_SOC_SAMA5D35]     = "sama5d35",
 266         [AT91_SOC_SAMA5D36]     = "sama5d36",
 267         [AT91_SOC_SAMA5D41]     = "sama5d41",
 268         [AT91_SOC_SAMA5D42]     = "sama5d42",
 269         [AT91_SOC_SAMA5D43]     = "sama5d43",
 270         [AT91_SOC_SAMA5D44]     = "sama5d44",
 271         [AT91_SOC_SUBTYPE_NONE] = "None",
 272         [AT91_SOC_SUBTYPE_UNKNOWN] = "Unknown",
 273 };
 274
 275 const char *at91_get_soc_subtype(struct at91_socinfo *c)
 276 {
 277         return soc_subtype_name[c->subtype];
 278 }
 279 EXPORT_SYMBOL(at91_get_soc_subtype);
 280
 281 void __init at91_map_io(void)
 282 {
 283         /* Map peripherals */
 284         iotable_init(&at91_io_desc, 1);
 285
 286         at91_soc_initdata.type = AT91_SOC_UNKNOWN;
 287         at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_UNKNOWN;
 288
 289         soc_detect(AT91_BASE_DBGU0);
 290         if (!at91_soc_is_detected())
 291                 soc_detect(AT91_BASE_DBGU1);
 292
 293         if (!at91_soc_is_detected())
 294                 panic(pr_fmt("Impossible to detect the SOC type"));
 295
 296         pr_info("Detected soc type: %s\n",
 297                 at91_get_soc_type(&at91_soc_initdata));
 298         if (at91_soc_initdata.subtype != AT91_SOC_SUBTYPE_NONE)
 299                 pr_info("Detected soc subtype: %s\n",
 300                         at91_get_soc_subtype(&at91_soc_initdata));
 301 }
 302
 303 void __init at91_alt_map_io(void)
 304 {
 305         /* Map peripherals */
 306         iotable_init(&at91_alt_io_desc, 1);
 307
 308         at91_soc_initdata.type = AT91_SOC_UNKNOWN;
 309         at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_UNKNOWN;
 310
 311         alt_soc_detect(AT91_BASE_DBGU2);
 312         if (!at91_soc_is_detected())
 313                 panic("AT91: Impossible to detect the SOC type");
 314
 315         pr_info("AT91: Detected soc type: %s\n",
 316                 at91_get_soc_type(&at91_soc_initdata));
 317         if (at91_soc_initdata.subtype != AT91_SOC_SUBTYPE_NONE)
 318                 pr_info("AT91: Detected soc subtype: %s\n",
 319                         at91_get_soc_subtype(&at91_soc_initdata));
 320 }
 321
 322 void __iomem *at91_matrix_base;
 323 EXPORT_SYMBOL_GPL(at91_matrix_base);
 324
 325 void __init at91_ioremap_matrix(u32 base_addr)
 326 {
 327         at91_matrix_base = ioremap(base_addr, 512);
 328         if (!at91_matrix_base)
 329                 panic(pr_fmt("Impossible to ioremap at91_matrix_base\n"));
 330 }