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
  12 #include <asm/mach/map.h>
  13
  14 #include <mach/hardware.h>
  15 #include <mach/cpu.h>
  16 #include <mach/at91_dbgu.h>
  17 #include <mach/at91_pmc.h>
  18
  19 #include "soc.h"
  20 #include "generic.h"
  21
  22 struct at91_init_soc __initdata at91_boot_soc;
  23
  24 struct at91_socinfo at91_soc_initdata;
  25 EXPORT_SYMBOL(at91_soc_initdata);
  26
  27 void __init at91rm9200_set_type(int type)
  28 {
  29         if (type == ARCH_REVISON_9200_PQFP)
  30                 at91_soc_initdata.subtype = AT91_SOC_RM9200_BGA;
  31         else
  32                 at91_soc_initdata.subtype = AT91_SOC_RM9200_PQFP;
  33 }
  34
  35 void __init at91_init_irq_default(void)
  36 {
  37         at91_init_interrupts(at91_boot_soc.default_irq_priority);
  38 }
  39
  40 void __init at91_init_interrupts(unsigned int *priority)
  41 {
  42         /* Initialize the AIC interrupt controller */
  43         at91_aic_init(priority);
  44
  45         /* Enable GPIO interrupts */
  46         at91_gpio_irq_setup();
  47 }
  48
  49 static struct map_desc sram_desc[2] __initdata;
  50
  51 void __init at91_init_sram(int bank, unsigned long base, unsigned int length)
  52 {
  53         struct map_desc *desc = &sram_desc[bank];
  54
  55         desc->virtual = AT91_IO_VIRT_BASE - length;
  56         if (bank > 0)
  57                 desc->virtual -= sram_desc[bank - 1].length;
  58
  59         desc->pfn = __phys_to_pfn(base);
  60         desc->length = length;
  61         desc->type = MT_DEVICE;
  62
  63         pr_info("AT91: sram at 0x%lx of 0x%x mapped at 0x%lx\n",
  64                 base, length, desc->virtual);
  65
  66         iotable_init(desc, 1);
  67 }
  68
  69 static struct map_desc at91_io_desc __initdata = {
  70         .virtual        = AT91_VA_BASE_SYS,
  71         .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  72         .length         = SZ_16K,
  73         .type           = MT_DEVICE,
  74 };
  75
  76 void __iomem *at91_ioremap(unsigned long p, size_t size, unsigned int type)
  77 {
  78         if (p >= AT91_BASE_SYS && p <= (AT91_BASE_SYS + SZ_16K - 1))
  79                 return (void __iomem *)AT91_IO_P2V(p);
  80
  81         return __arm_ioremap_caller(p, size, type, __builtin_return_address(0));
  82 }
  83 EXPORT_SYMBOL(at91_ioremap);
  84
  85 void at91_iounmap(volatile void __iomem *addr)
  86 {
  87         unsigned long virt = (unsigned long)addr;
  88
  89         if (virt >= VMALLOC_START && virt < VMALLOC_END)
  90                 __iounmap(addr);
  91 }
  92 EXPORT_SYMBOL(at91_iounmap);
  93
  94 #define AT91_DBGU0      0xfffff200
  95 #define AT91_DBGU1      0xffffee00
  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_AT91CAP9: {
 106 #ifdef CONFIG_AT91_PMC_UNIT
 107                 u32 pmc_ver = at91_sys_read(AT91_PMC_VER);
 108
 109                 if (pmc_ver == ARCH_REVISION_CAP9_B)
 110                         at91_soc_initdata.subtype = AT91_SOC_CAP9_REV_B;
 111                 else if (pmc_ver == ARCH_REVISION_CAP9_C)
 112                         at91_soc_initdata.subtype = AT91_SOC_CAP9_REV_C;
 113 #endif
 114                 at91_soc_initdata.type = AT91_SOC_CAP9;
 115                 at91_boot_soc = at91cap9_soc;
 116                 break;
 117         }
 118
 119         case ARCH_ID_AT91RM9200:
 120                 at91_soc_initdata.type = AT91_SOC_RM9200;
 121                 at91_boot_soc = at91rm9200_soc;
 122                 break;
 123
 124         case ARCH_ID_AT91SAM9260:
 125                 at91_soc_initdata.type = AT91_SOC_SAM9260;
 126                 at91_boot_soc = at91sam9260_soc;
 127                 break;
 128
 129         case ARCH_ID_AT91SAM9261:
 130                 at91_soc_initdata.type = AT91_SOC_SAM9261;
 131                 at91_boot_soc = at91sam9261_soc;
 132                 break;
 133
 134         case ARCH_ID_AT91SAM9263:
 135                 at91_soc_initdata.type = AT91_SOC_SAM9263;
 136                 at91_boot_soc = at91sam9263_soc;
 137                 break;
 138
 139         case ARCH_ID_AT91SAM9G20:
 140                 at91_soc_initdata.type = AT91_SOC_SAM9G20;
 141                 at91_boot_soc = at91sam9260_soc;
 142                 break;
 143
 144         case ARCH_ID_AT91SAM9G45:
 145                 at91_soc_initdata.type = AT91_SOC_SAM9G45;
 146                 if (cidr == ARCH_ID_AT91SAM9G45ES)
 147                         at91_soc_initdata.subtype = AT91_SOC_SAM9G45ES;
 148                 at91_boot_soc = at91sam9g45_soc;
 149                 break;
 150
 151         case ARCH_ID_AT91SAM9RL64:
 152                 at91_soc_initdata.type = AT91_SOC_SAM9RL;
 153                 at91_boot_soc = at91sam9rl_soc;
 154                 break;
 155
 156         case ARCH_ID_AT91SAM9X5:
 157                 at91_soc_initdata.type = AT91_SOC_SAM9X5;
 158                 at91_boot_soc = at91sam9x5_soc;
 159                 break;
 160         }
 161
 162         /* at91sam9g10 */
 163         if ((cidr & ~AT91_CIDR_EXT) == ARCH_ID_AT91SAM9G10) {
 164                 at91_soc_initdata.type = AT91_SOC_SAM9G10;
 165                 at91_boot_soc = at91sam9261_soc;
 166         }
 167         /* at91sam9xe */
 168         else if ((cidr & AT91_CIDR_ARCH) == ARCH_FAMILY_AT91SAM9XE) {
 169                 at91_soc_initdata.type = AT91_SOC_SAM9260;
 170                 at91_soc_initdata.subtype = AT91_SOC_SAM9XE;
 171                 at91_boot_soc = at91sam9260_soc;
 172         }
 173
 174         if (!at91_soc_is_detected())
 175                 return;
 176
 177         at91_soc_initdata.cidr = cidr;
 178
 179         /* sub version of soc */
 180         at91_soc_initdata.exid = __raw_readl(AT91_IO_P2V(dbgu_base) + AT91_DBGU_EXID);
 181
 182         if (at91_soc_initdata.type == AT91_SOC_SAM9G45) {
 183                 switch (at91_soc_initdata.exid) {
 184                 case ARCH_EXID_AT91SAM9M10:
 185                         at91_soc_initdata.subtype = AT91_SOC_SAM9M10;
 186                         break;
 187                 case ARCH_EXID_AT91SAM9G46:
 188                         at91_soc_initdata.subtype = AT91_SOC_SAM9G46;
 189                         break;
 190                 case ARCH_EXID_AT91SAM9M11:
 191                         at91_soc_initdata.subtype = AT91_SOC_SAM9M11;
 192                         break;
 193                 }
 194         }
 195
 196         if (at91_soc_initdata.type == AT91_SOC_SAM9X5) {
 197                 switch (at91_soc_initdata.exid) {
 198                 case ARCH_EXID_AT91SAM9G15:
 199                         at91_soc_initdata.subtype = AT91_SOC_SAM9G15;
 200                         break;
 201                 case ARCH_EXID_AT91SAM9G35:
 202                         at91_soc_initdata.subtype = AT91_SOC_SAM9G35;
 203                         break;
 204                 case ARCH_EXID_AT91SAM9X35:
 205                         at91_soc_initdata.subtype = AT91_SOC_SAM9X35;
 206                         break;
 207                 case ARCH_EXID_AT91SAM9G25:
 208                         at91_soc_initdata.subtype = AT91_SOC_SAM9G25;
 209                         break;
 210                 case ARCH_EXID_AT91SAM9X25:
 211                         at91_soc_initdata.subtype = AT91_SOC_SAM9X25;
 212                         break;
 213                 }
 214         }
 215 }
 216
 217 static const char *soc_name[] = {
 218         [AT91_SOC_RM9200]       = "at91rm9200",
 219         [AT91_SOC_CAP9]         = "at91cap9",
 220         [AT91_SOC_SAM9260]      = "at91sam9260",
 221         [AT91_SOC_SAM9261]      = "at91sam9261",
 222         [AT91_SOC_SAM9263]      = "at91sam9263",
 223         [AT91_SOC_SAM9G10]      = "at91sam9g10",
 224         [AT91_SOC_SAM9G20]      = "at91sam9g20",
 225         [AT91_SOC_SAM9G45]      = "at91sam9g45",
 226         [AT91_SOC_SAM9RL]       = "at91sam9rl",
 227         [AT91_SOC_SAM9X5]       = "at91sam9x5",
 228         [AT91_SOC_NONE]         = "Unknown"
 229 };
 230
 231 const char *at91_get_soc_type(struct at91_socinfo *c)
 232 {
 233         return soc_name[c->type];
 234 }
 235 EXPORT_SYMBOL(at91_get_soc_type);
 236
 237 static const char *soc_subtype_name[] = {
 238         [AT91_SOC_RM9200_BGA]   = "at91rm9200 BGA",
 239         [AT91_SOC_RM9200_PQFP]  = "at91rm9200 PQFP",
 240         [AT91_SOC_CAP9_REV_B]   = "at91cap9 revB",
 241         [AT91_SOC_CAP9_REV_C]   = "at91cap9 revC",
 242         [AT91_SOC_SAM9XE]       = "at91sam9xe",
 243         [AT91_SOC_SAM9G45ES]    = "at91sam9g45es",
 244         [AT91_SOC_SAM9M10]      = "at91sam9m10",
 245         [AT91_SOC_SAM9G46]      = "at91sam9g46",
 246         [AT91_SOC_SAM9M11]      = "at91sam9m11",
 247         [AT91_SOC_SAM9G15]      = "at91sam9g15",
 248         [AT91_SOC_SAM9G35]      = "at91sam9g35",
 249         [AT91_SOC_SAM9X35]      = "at91sam9x35",
 250         [AT91_SOC_SAM9G25]      = "at91sam9g25",
 251         [AT91_SOC_SAM9X25]      = "at91sam9x25",
 252         [AT91_SOC_SUBTYPE_NONE] = "Unknown"
 253 };
 254
 255 const char *at91_get_soc_subtype(struct at91_socinfo *c)
 256 {
 257         return soc_subtype_name[c->subtype];
 258 }
 259 EXPORT_SYMBOL(at91_get_soc_subtype);
 260
 261 void __init at91_map_io(void)
 262 {
 263         /* Map peripherals */
 264         iotable_init(&at91_io_desc, 1);
 265
 266         at91_soc_initdata.type = AT91_SOC_NONE;
 267         at91_soc_initdata.subtype = AT91_SOC_SUBTYPE_NONE;
 268
 269         soc_detect(AT91_DBGU0);
 270         if (!at91_soc_is_detected())
 271                 soc_detect(AT91_DBGU1);
 272
 273         if (!at91_soc_is_detected())
 274                 panic("AT91: Impossible to detect the SOC type");
 275
 276         pr_info("AT91: Detected soc type: %s\n",
 277                 at91_get_soc_type(&at91_soc_initdata));
 278         pr_info("AT91: Detected soc subtype: %s\n",
 279                 at91_get_soc_subtype(&at91_soc_initdata));
 280
 281         if (!at91_soc_is_enabled())
 282                 panic("AT91: Soc not enabled");
 283
 284         if (at91_boot_soc.map_io)
 285                 at91_boot_soc.map_io();
 286 }
 287
 288 void __init at91_initialize(unsigned long main_clock)
 289 {
 290         /* Init clock subsystem */
 291         at91_clock_init(main_clock);
 292
 293         /* Register the processor-specific clocks */
 294         at91_boot_soc.register_clocks();
 295
 296         at91_boot_soc.init();
 297 }