release/src-rt-6.x/linux/linux-2.6/arch/arm/mach-at91/at91sam9260.c

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