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   1 /*
   2  * arch/arm/mach-at91/at91sam9260.c
   3  *
   4  *  Copyright (C) 2006 SAN People
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/pm.h>
  15
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18 #include <mach/cpu.h>
  19 #include <mach/at91sam9260.h>
  20 #include <mach/at91_pmc.h>
  21 #include <mach/at91_rstc.h>
  22 #include <mach/at91_shdwc.h>
  23
  24 #include "generic.h"
  25 #include "clock.h"
  26
  27 static struct map_desc at91sam9260_io_desc[] __initdata = {
  28         {
  29                 .virtual        = AT91_VA_BASE_SYS,
  30                 .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  31                 .length         = SZ_16K,
  32                 .type           = MT_DEVICE,
  33         }
  34 };
  35
  36 static struct map_desc at91sam9260_sram_desc[] __initdata = {
  37         {
  38                 .virtual        = AT91_IO_VIRT_BASE - AT91SAM9260_SRAM0_SIZE,
  39                 .pfn            = __phys_to_pfn(AT91SAM9260_SRAM0_BASE),
  40                 .length         = AT91SAM9260_SRAM0_SIZE,
  41                 .type           = MT_DEVICE,
  42         }, {
  43                 .virtual        = AT91_IO_VIRT_BASE - AT91SAM9260_SRAM0_SIZE - AT91SAM9260_SRAM1_SIZE,
  44                 .pfn            = __phys_to_pfn(AT91SAM9260_SRAM1_BASE),
  45                 .length         = AT91SAM9260_SRAM1_SIZE,
  46                 .type           = MT_DEVICE,
  47         }
  48 };
  49
  50 static struct map_desc at91sam9g20_sram_desc[] __initdata = {
  51         {
  52                 .virtual        = AT91_IO_VIRT_BASE - AT91SAM9G20_SRAM0_SIZE,
  53                 .pfn            = __phys_to_pfn(AT91SAM9G20_SRAM0_BASE),
  54                 .length         = AT91SAM9G20_SRAM0_SIZE,
  55                 .type           = MT_DEVICE,
  56         }, {
  57                 .virtual        = AT91_IO_VIRT_BASE - AT91SAM9G20_SRAM0_SIZE - AT91SAM9G20_SRAM1_SIZE,
  58                 .pfn            = __phys_to_pfn(AT91SAM9G20_SRAM1_BASE),
  59                 .length         = AT91SAM9G20_SRAM1_SIZE,
  60                 .type           = MT_DEVICE,
  61         }
  62 };
  63
  64 static struct map_desc at91sam9xe_sram_desc[] __initdata = {
  65         {
  66                 .pfn            = __phys_to_pfn(AT91SAM9XE_SRAM_BASE),
  67                 .type           = MT_DEVICE,
  68         }
  69 };
  70
  71 /* --------------------------------------------------------------------
  72  *  Clocks
  73  * -------------------------------------------------------------------- */
  74
  75 /*
  76  * The peripheral clocks.
  77  */
  78 static struct clk pioA_clk = {
  79         .name           = "pioA_clk",
  80         .pmc_mask       = 1 << AT91SAM9260_ID_PIOA,
  81         .type           = CLK_TYPE_PERIPHERAL,
  82 };
  83 static struct clk pioB_clk = {
  84         .name           = "pioB_clk",
  85         .pmc_mask       = 1 << AT91SAM9260_ID_PIOB,
  86         .type           = CLK_TYPE_PERIPHERAL,
  87 };
  88 static struct clk pioC_clk = {
  89         .name           = "pioC_clk",
  90         .pmc_mask       = 1 << AT91SAM9260_ID_PIOC,
  91         .type           = CLK_TYPE_PERIPHERAL,
  92 };
  93 static struct clk adc_clk = {
  94         .name           = "adc_clk",
  95         .pmc_mask       = 1 << AT91SAM9260_ID_ADC,
  96         .type           = CLK_TYPE_PERIPHERAL,
  97 };
  98 static struct clk usart0_clk = {
  99         .name           = "usart0_clk",
 100         .pmc_mask       = 1 << AT91SAM9260_ID_US0,
 101         .type           = CLK_TYPE_PERIPHERAL,
 102 };
 103 static struct clk usart1_clk = {
 104         .name           = "usart1_clk",
 105         .pmc_mask       = 1 << AT91SAM9260_ID_US1,
 106         .type           = CLK_TYPE_PERIPHERAL,
 107 };
 108 static struct clk usart2_clk = {
 109         .name           = "usart2_clk",
 110         .pmc_mask       = 1 << AT91SAM9260_ID_US2,
 111         .type           = CLK_TYPE_PERIPHERAL,
 112 };
 113 static struct clk mmc_clk = {
 114         .name           = "mci_clk",
 115         .pmc_mask       = 1 << AT91SAM9260_ID_MCI,
 116         .type           = CLK_TYPE_PERIPHERAL,
 117 };
 118 static struct clk udc_clk = {
 119         .name           = "udc_clk",
 120         .pmc_mask       = 1 << AT91SAM9260_ID_UDP,
 121         .type           = CLK_TYPE_PERIPHERAL,
 122 };
 123 static struct clk twi_clk = {
 124         .name           = "twi_clk",
 125         .pmc_mask       = 1 << AT91SAM9260_ID_TWI,
 126         .type           = CLK_TYPE_PERIPHERAL,
 127 };
 128 static struct clk spi0_clk = {
 129         .name           = "spi0_clk",
 130         .pmc_mask       = 1 << AT91SAM9260_ID_SPI0,
 131         .type           = CLK_TYPE_PERIPHERAL,
 132 };
 133 static struct clk spi1_clk = {
 134         .name           = "spi1_clk",
 135         .pmc_mask       = 1 << AT91SAM9260_ID_SPI1,
 136         .type           = CLK_TYPE_PERIPHERAL,
 137 };
 138 static struct clk ssc_clk = {
 139         .name           = "ssc_clk",
 140         .pmc_mask       = 1 << AT91SAM9260_ID_SSC,
 141         .type           = CLK_TYPE_PERIPHERAL,
 142 };
 143 static struct clk tc0_clk = {
 144         .name           = "tc0_clk",
 145         .pmc_mask       = 1 << AT91SAM9260_ID_TC0,
 146         .type           = CLK_TYPE_PERIPHERAL,
 147 };
 148 static struct clk tc1_clk = {
 149         .name           = "tc1_clk",
 150         .pmc_mask       = 1 << AT91SAM9260_ID_TC1,
 151         .type           = CLK_TYPE_PERIPHERAL,
 152 };
 153 static struct clk tc2_clk = {
 154         .name           = "tc2_clk",
 155         .pmc_mask       = 1 << AT91SAM9260_ID_TC2,
 156         .type           = CLK_TYPE_PERIPHERAL,
 157 };
 158 static struct clk ohci_clk = {
 159         .name           = "ohci_clk",
 160         .pmc_mask       = 1 << AT91SAM9260_ID_UHP,
 161         .type           = CLK_TYPE_PERIPHERAL,
 162 };
 163 static struct clk macb_clk = {
 164         .name           = "macb_clk",
 165         .pmc_mask       = 1 << AT91SAM9260_ID_EMAC,
 166         .type           = CLK_TYPE_PERIPHERAL,
 167 };
 168 static struct clk isi_clk = {
 169         .name           = "isi_clk",
 170         .pmc_mask       = 1 << AT91SAM9260_ID_ISI,
 171         .type           = CLK_TYPE_PERIPHERAL,
 172 };
 173 static struct clk usart3_clk = {
 174         .name           = "usart3_clk",
 175         .pmc_mask       = 1 << AT91SAM9260_ID_US3,
 176         .type           = CLK_TYPE_PERIPHERAL,
 177 };
 178 static struct clk usart4_clk = {
 179         .name           = "usart4_clk",
 180         .pmc_mask       = 1 << AT91SAM9260_ID_US4,
 181         .type           = CLK_TYPE_PERIPHERAL,
 182 };
 183 static struct clk usart5_clk = {
 184         .name           = "usart5_clk",
 185         .pmc_mask       = 1 << AT91SAM9260_ID_US5,
 186         .type           = CLK_TYPE_PERIPHERAL,
 187 };
 188 static struct clk tc3_clk = {
 189         .name           = "tc3_clk",
 190         .pmc_mask       = 1 << AT91SAM9260_ID_TC3,
 191         .type           = CLK_TYPE_PERIPHERAL,
 192 };
 193 static struct clk tc4_clk = {
 194         .name           = "tc4_clk",
 195         .pmc_mask       = 1 << AT91SAM9260_ID_TC4,
 196         .type           = CLK_TYPE_PERIPHERAL,
 197 };
 198 static struct clk tc5_clk = {
 199         .name           = "tc5_clk",
 200         .pmc_mask       = 1 << AT91SAM9260_ID_TC5,
 201         .type           = CLK_TYPE_PERIPHERAL,
 202 };
 203
 204 static struct clk *periph_clocks[] __initdata = {
 205         &pioA_clk,
 206         &pioB_clk,
 207         &pioC_clk,
 208         &adc_clk,
 209         &usart0_clk,
 210         &usart1_clk,
 211         &usart2_clk,
 212         &mmc_clk,
 213         &udc_clk,
 214         &twi_clk,
 215         &spi0_clk,
 216         &spi1_clk,
 217         &ssc_clk,
 218         &tc0_clk,
 219         &tc1_clk,
 220         &tc2_clk,
 221         &ohci_clk,
 222         &macb_clk,
 223         &isi_clk,
 224         &usart3_clk,
 225         &usart4_clk,
 226         &usart5_clk,
 227         &tc3_clk,
 228         &tc4_clk,
 229         &tc5_clk,
 230         // irq0 .. irq2
 231 };
 232
 233 /*
 234  * The two programmable clocks.
 235  * You must configure pin multiplexing to bring these signals out.
 236  */
 237 static struct clk pck0 = {
 238         .name           = "pck0",
 239         .pmc_mask       = AT91_PMC_PCK0,
 240         .type           = CLK_TYPE_PROGRAMMABLE,
 241         .id             = 0,
 242 };
 243 static struct clk pck1 = {
 244         .name           = "pck1",
 245         .pmc_mask       = AT91_PMC_PCK1,
 246         .type           = CLK_TYPE_PROGRAMMABLE,
 247         .id             = 1,
 248 };
 249
 250 static void __init at91sam9260_register_clocks(void)
 251 {
 252         int i;
 253
 254         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 255                 clk_register(periph_clocks[i]);
 256
 257         clk_register(&pck0);
 258         clk_register(&pck1);
 259 }
 260
 261 /* --------------------------------------------------------------------
 262  *  GPIO
 263  * -------------------------------------------------------------------- */
 264
 265 static struct at91_gpio_bank at91sam9260_gpio[] = {
 266         {
 267                 .id             = AT91SAM9260_ID_PIOA,
 268                 .offset         = AT91_PIOA,
 269                 .clock          = &pioA_clk,
 270         }, {
 271                 .id             = AT91SAM9260_ID_PIOB,
 272                 .offset         = AT91_PIOB,
 273                 .clock          = &pioB_clk,
 274         }, {
 275                 .id             = AT91SAM9260_ID_PIOC,
 276                 .offset         = AT91_PIOC,
 277                 .clock          = &pioC_clk,
 278         }
 279 };
 280
 281 static void at91sam9260_reset(void)
 282 {
 283         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 284 }
 285
 286 static void at91sam9260_poweroff(void)
 287 {
 288         at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 289 }
 290
 291
 292 /* --------------------------------------------------------------------
 293  *  AT91SAM9260 processor initialization
 294  * -------------------------------------------------------------------- */
 295
 296 static void __init at91sam9xe_initialize(void)
 297 {
 298         unsigned long cidr, sram_size;
 299
 300         cidr = at91_sys_read(AT91_DBGU_CIDR);
 301
 302         switch (cidr & AT91_CIDR_SRAMSIZ) {
 303                 case AT91_CIDR_SRAMSIZ_32K:
 304                         sram_size = 2 * SZ_16K;
 305                         break;
 306                 case AT91_CIDR_SRAMSIZ_16K:
 307                 default:
 308                         sram_size = SZ_16K;
 309         }
 310
 311         at91sam9xe_sram_desc->virtual = AT91_IO_VIRT_BASE - sram_size;
 312         at91sam9xe_sram_desc->length = sram_size;
 313
 314         iotable_init(at91sam9xe_sram_desc, ARRAY_SIZE(at91sam9xe_sram_desc));
 315 }
 316
 317 void __init at91sam9260_initialize(unsigned long main_clock)
 318 {
 319         /* Map peripherals */
 320         iotable_init(at91sam9260_io_desc, ARRAY_SIZE(at91sam9260_io_desc));
 321
 322         if (cpu_is_at91sam9xe())
 323                 at91sam9xe_initialize();
 324         else if (cpu_is_at91sam9g20())
 325                 iotable_init(at91sam9g20_sram_desc, ARRAY_SIZE(at91sam9g20_sram_desc));
 326         else
 327                 iotable_init(at91sam9260_sram_desc, ARRAY_SIZE(at91sam9260_sram_desc));
 328
 329         at91_arch_reset = at91sam9260_reset;
 330         pm_power_off = at91sam9260_poweroff;
 331         at91_extern_irq = (1 << AT91SAM9260_ID_IRQ0) | (1 << AT91SAM9260_ID_IRQ1)
 332                         | (1 << AT91SAM9260_ID_IRQ2);
 333
 334         /* Init clock subsystem */
 335         at91_clock_init(main_clock);
 336
 337         /* Register the processor-specific clocks */
 338         at91sam9260_register_clocks();
 339
 340         /* Register GPIO subsystem */
 341         at91_gpio_init(at91sam9260_gpio, 3);
 342 }
 343
 344 /* --------------------------------------------------------------------
 345  *  Interrupt initialization
 346  * -------------------------------------------------------------------- */
 347
 348 /*
 349  * The default interrupt priority levels (0 = lowest, 7 = highest).
 350  */
 351 static unsigned int at91sam9260_default_irq_priority[NR_AIC_IRQS] __initdata = {
 352         7,      /* Advanced Interrupt Controller */
 353         7,      /* System Peripherals */
 354         1,      /* Parallel IO Controller A */
 355         1,      /* Parallel IO Controller B */
 356         1,      /* Parallel IO Controller C */
 357         0,      /* Analog-to-Digital Converter */
 358         5,      /* USART 0 */
 359         5,      /* USART 1 */
 360         5,      /* USART 2 */
 361         0,      /* Multimedia Card Interface */
 362         2,      /* USB Device Port */
 363         6,      /* Two-Wire Interface */
 364         5,      /* Serial Peripheral Interface 0 */
 365         5,      /* Serial Peripheral Interface 1 */
 366         5,      /* Serial Synchronous Controller */
 367         0,
 368         0,
 369         0,      /* Timer Counter 0 */
 370         0,      /* Timer Counter 1 */
 371         0,      /* Timer Counter 2 */
 372         2,      /* USB Host port */
 373         3,      /* Ethernet */
 374         0,      /* Image Sensor Interface */
 375         5,      /* USART 3 */
 376         5,      /* USART 4 */
 377         5,      /* USART 5 */
 378         0,      /* Timer Counter 3 */
 379         0,      /* Timer Counter 4 */
 380         0,      /* Timer Counter 5 */
 381         0,      /* Advanced Interrupt Controller */
 382         0,      /* Advanced Interrupt Controller */
 383         0,      /* Advanced Interrupt Controller */
 384 };
 385
 386 void __init at91sam9260_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 387 {
 388         if (!priority)
 389                 priority = at91sam9260_default_irq_priority;
 390
 391         /* Initialize the AIC interrupt controller */
 392         at91_aic_init(priority);
 393
 394         /* Enable GPIO interrupts */
 395         at91_gpio_irq_setup();
 396 }