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/proc-fns.h>
  16 #include <asm/irq.h>
  17 #include <asm/mach/arch.h>
  18 #include <asm/mach/map.h>
  19 #include <asm/system_misc.h>
  20 #include <mach/cpu.h>
  21 #include <mach/at91_dbgu.h>
  22 #include <mach/at91sam9260.h>
  23 #include <mach/at91_pmc.h>
  24 #include <mach/at91_rstc.h>
  25
  26 #include "soc.h"
  27 #include "generic.h"
  28 #include "clock.h"
  29 #include "sam9_smc.h"
  30
  31 /* --------------------------------------------------------------------
  32  *  Clocks
  33  * -------------------------------------------------------------------- */
  34
  35 /*
  36  * The peripheral clocks.
  37  */
  38 static struct clk pioA_clk = {
  39         .name           = "pioA_clk",
  40         .pmc_mask       = 1 << AT91SAM9260_ID_PIOA,
  41         .type           = CLK_TYPE_PERIPHERAL,
  42 };
  43 static struct clk pioB_clk = {
  44         .name           = "pioB_clk",
  45         .pmc_mask       = 1 << AT91SAM9260_ID_PIOB,
  46         .type           = CLK_TYPE_PERIPHERAL,
  47 };
  48 static struct clk pioC_clk = {
  49         .name           = "pioC_clk",
  50         .pmc_mask       = 1 << AT91SAM9260_ID_PIOC,
  51         .type           = CLK_TYPE_PERIPHERAL,
  52 };
  53 static struct clk adc_clk = {
  54         .name           = "adc_clk",
  55         .pmc_mask       = 1 << AT91SAM9260_ID_ADC,
  56         .type           = CLK_TYPE_PERIPHERAL,
  57 };
  58 static struct clk usart0_clk = {
  59         .name           = "usart0_clk",
  60         .pmc_mask       = 1 << AT91SAM9260_ID_US0,
  61         .type           = CLK_TYPE_PERIPHERAL,
  62 };
  63 static struct clk usart1_clk = {
  64         .name           = "usart1_clk",
  65         .pmc_mask       = 1 << AT91SAM9260_ID_US1,
  66         .type           = CLK_TYPE_PERIPHERAL,
  67 };
  68 static struct clk usart2_clk = {
  69         .name           = "usart2_clk",
  70         .pmc_mask       = 1 << AT91SAM9260_ID_US2,
  71         .type           = CLK_TYPE_PERIPHERAL,
  72 };
  73 static struct clk mmc_clk = {
  74         .name           = "mci_clk",
  75         .pmc_mask       = 1 << AT91SAM9260_ID_MCI,
  76         .type           = CLK_TYPE_PERIPHERAL,
  77 };
  78 static struct clk udc_clk = {
  79         .name           = "udc_clk",
  80         .pmc_mask       = 1 << AT91SAM9260_ID_UDP,
  81         .type           = CLK_TYPE_PERIPHERAL,
  82 };
  83 static struct clk twi_clk = {
  84         .name           = "twi_clk",
  85         .pmc_mask       = 1 << AT91SAM9260_ID_TWI,
  86         .type           = CLK_TYPE_PERIPHERAL,
  87 };
  88 static struct clk spi0_clk = {
  89         .name           = "spi0_clk",
  90         .pmc_mask       = 1 << AT91SAM9260_ID_SPI0,
  91         .type           = CLK_TYPE_PERIPHERAL,
  92 };
  93 static struct clk spi1_clk = {
  94         .name           = "spi1_clk",
  95         .pmc_mask       = 1 << AT91SAM9260_ID_SPI1,
  96         .type           = CLK_TYPE_PERIPHERAL,
  97 };
  98 static struct clk ssc_clk = {
  99         .name           = "ssc_clk",
 100         .pmc_mask       = 1 << AT91SAM9260_ID_SSC,
 101         .type           = CLK_TYPE_PERIPHERAL,
 102 };
 103 static struct clk tc0_clk = {
 104         .name           = "tc0_clk",
 105         .pmc_mask       = 1 << AT91SAM9260_ID_TC0,
 106         .type           = CLK_TYPE_PERIPHERAL,
 107 };
 108 static struct clk tc1_clk = {
 109         .name           = "tc1_clk",
 110         .pmc_mask       = 1 << AT91SAM9260_ID_TC1,
 111         .type           = CLK_TYPE_PERIPHERAL,
 112 };
 113 static struct clk tc2_clk = {
 114         .name           = "tc2_clk",
 115         .pmc_mask       = 1 << AT91SAM9260_ID_TC2,
 116         .type           = CLK_TYPE_PERIPHERAL,
 117 };
 118 static struct clk ohci_clk = {
 119         .name           = "ohci_clk",
 120         .pmc_mask       = 1 << AT91SAM9260_ID_UHP,
 121         .type           = CLK_TYPE_PERIPHERAL,
 122 };
 123 static struct clk macb_clk = {
 124         .name           = "pclk",
 125         .pmc_mask       = 1 << AT91SAM9260_ID_EMAC,
 126         .type           = CLK_TYPE_PERIPHERAL,
 127 };
 128 static struct clk isi_clk = {
 129         .name           = "isi_clk",
 130         .pmc_mask       = 1 << AT91SAM9260_ID_ISI,
 131         .type           = CLK_TYPE_PERIPHERAL,
 132 };
 133 static struct clk usart3_clk = {
 134         .name           = "usart3_clk",
 135         .pmc_mask       = 1 << AT91SAM9260_ID_US3,
 136         .type           = CLK_TYPE_PERIPHERAL,
 137 };
 138 static struct clk usart4_clk = {
 139         .name           = "usart4_clk",
 140         .pmc_mask       = 1 << AT91SAM9260_ID_US4,
 141         .type           = CLK_TYPE_PERIPHERAL,
 142 };
 143 static struct clk usart5_clk = {
 144         .name           = "usart5_clk",
 145         .pmc_mask       = 1 << AT91SAM9260_ID_US5,
 146         .type           = CLK_TYPE_PERIPHERAL,
 147 };
 148 static struct clk tc3_clk = {
 149         .name           = "tc3_clk",
 150         .pmc_mask       = 1 << AT91SAM9260_ID_TC3,
 151         .type           = CLK_TYPE_PERIPHERAL,
 152 };
 153 static struct clk tc4_clk = {
 154         .name           = "tc4_clk",
 155         .pmc_mask       = 1 << AT91SAM9260_ID_TC4,
 156         .type           = CLK_TYPE_PERIPHERAL,
 157 };
 158 static struct clk tc5_clk = {
 159         .name           = "tc5_clk",
 160         .pmc_mask       = 1 << AT91SAM9260_ID_TC5,
 161         .type           = CLK_TYPE_PERIPHERAL,
 162 };
 163
 164 static struct clk *periph_clocks[] __initdata = {
 165         &pioA_clk,
 166         &pioB_clk,
 167         &pioC_clk,
 168         &adc_clk,
 169         &usart0_clk,
 170         &usart1_clk,
 171         &usart2_clk,
 172         &mmc_clk,
 173         &udc_clk,
 174         &twi_clk,
 175         &spi0_clk,
 176         &spi1_clk,
 177         &ssc_clk,
 178         &tc0_clk,
 179         &tc1_clk,
 180         &tc2_clk,
 181         &ohci_clk,
 182         &macb_clk,
 183         &isi_clk,
 184         &usart3_clk,
 185         &usart4_clk,
 186         &usart5_clk,
 187         &tc3_clk,
 188         &tc4_clk,
 189         &tc5_clk,
 190         // irq0 .. irq2
 191 };
 192
 193 static struct clk_lookup periph_clocks_lookups[] = {
 194         /* One additional fake clock for macb_hclk */
 195         CLKDEV_CON_ID("hclk", &macb_clk),
 196         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk),
 197         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.1", &spi1_clk),
 198         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
 199         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
 200         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
 201         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tc3_clk),
 202         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk),
 203         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk),
 204         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc_clk),
 205         /* more usart lookup table for DT entries */
 206         CLKDEV_CON_DEV_ID("usart", "fffff200.serial", &mck),
 207         CLKDEV_CON_DEV_ID("usart", "fffb0000.serial", &usart0_clk),
 208         CLKDEV_CON_DEV_ID("usart", "fffb4000.serial", &usart1_clk),
 209         CLKDEV_CON_DEV_ID("usart", "fffb8000.serial", &usart2_clk),
 210         CLKDEV_CON_DEV_ID("usart", "fffd0000.serial", &usart3_clk),
 211         CLKDEV_CON_DEV_ID("usart", "fffd4000.serial", &usart4_clk),
 212         CLKDEV_CON_DEV_ID("usart", "fffd8000.serial", &usart5_clk),
 213         /* more tc lookup table for DT entries */
 214         CLKDEV_CON_DEV_ID("t0_clk", "fffa0000.timer", &tc0_clk),
 215         CLKDEV_CON_DEV_ID("t1_clk", "fffa0000.timer", &tc1_clk),
 216         CLKDEV_CON_DEV_ID("t2_clk", "fffa0000.timer", &tc2_clk),
 217         CLKDEV_CON_DEV_ID("t0_clk", "fffdc000.timer", &tc3_clk),
 218         CLKDEV_CON_DEV_ID("t1_clk", "fffdc000.timer", &tc4_clk),
 219         CLKDEV_CON_DEV_ID("t2_clk", "fffdc000.timer", &tc5_clk),
 220         CLKDEV_CON_DEV_ID("hclk", "500000.ohci", &ohci_clk),
 221         /* fake hclk clock */
 222         CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk),
 223         CLKDEV_CON_ID("pioA", &pioA_clk),
 224         CLKDEV_CON_ID("pioB", &pioB_clk),
 225         CLKDEV_CON_ID("pioC", &pioC_clk),
 226 };
 227
 228 static struct clk_lookup usart_clocks_lookups[] = {
 229         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 230         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 231         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 232         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 233         CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
 234         CLKDEV_CON_DEV_ID("usart", "atmel_usart.5", &usart4_clk),
 235         CLKDEV_CON_DEV_ID("usart", "atmel_usart.6", &usart5_clk),
 236 };
 237
 238 /*
 239  * The two programmable clocks.
 240  * You must configure pin multiplexing to bring these signals out.
 241  */
 242 static struct clk pck0 = {
 243         .name           = "pck0",
 244         .pmc_mask       = AT91_PMC_PCK0,
 245         .type           = CLK_TYPE_PROGRAMMABLE,
 246         .id             = 0,
 247 };
 248 static struct clk pck1 = {
 249         .name           = "pck1",
 250         .pmc_mask       = AT91_PMC_PCK1,
 251         .type           = CLK_TYPE_PROGRAMMABLE,
 252         .id             = 1,
 253 };
 254
 255 static void __init at91sam9260_register_clocks(void)
 256 {
 257         int i;
 258
 259         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 260                 clk_register(periph_clocks[i]);
 261
 262         clkdev_add_table(periph_clocks_lookups,
 263                          ARRAY_SIZE(periph_clocks_lookups));
 264         clkdev_add_table(usart_clocks_lookups,
 265                          ARRAY_SIZE(usart_clocks_lookups));
 266
 267         clk_register(&pck0);
 268         clk_register(&pck1);
 269 }
 270
 271 static struct clk_lookup console_clock_lookup;
 272
 273 void __init at91sam9260_set_console_clock(int id)
 274 {
 275         if (id >= ARRAY_SIZE(usart_clocks_lookups))
 276                 return;
 277
 278         console_clock_lookup.con_id = "usart";
 279         console_clock_lookup.clk = usart_clocks_lookups[id].clk;
 280         clkdev_add(&console_clock_lookup);
 281 }
 282
 283 /* --------------------------------------------------------------------
 284  *  GPIO
 285  * -------------------------------------------------------------------- */
 286
 287 static struct at91_gpio_bank at91sam9260_gpio[] __initdata = {
 288         {
 289                 .id             = AT91SAM9260_ID_PIOA,
 290                 .regbase        = AT91SAM9260_BASE_PIOA,
 291         }, {
 292                 .id             = AT91SAM9260_ID_PIOB,
 293                 .regbase        = AT91SAM9260_BASE_PIOB,
 294         }, {
 295                 .id             = AT91SAM9260_ID_PIOC,
 296                 .regbase        = AT91SAM9260_BASE_PIOC,
 297         }
 298 };
 299
 300 /* --------------------------------------------------------------------
 301  *  AT91SAM9260 processor initialization
 302  * -------------------------------------------------------------------- */
 303
 304 static void __init at91sam9xe_map_io(void)
 305 {
 306         unsigned long sram_size;
 307
 308         switch (at91_soc_initdata.cidr & AT91_CIDR_SRAMSIZ) {
 309                 case AT91_CIDR_SRAMSIZ_32K:
 310                         sram_size = 2 * SZ_16K;
 311                         break;
 312                 case AT91_CIDR_SRAMSIZ_16K:
 313                 default:
 314                         sram_size = SZ_16K;
 315         }
 316
 317         at91_init_sram(0, AT91SAM9XE_SRAM_BASE, sram_size);
 318 }
 319
 320 static void __init at91sam9260_map_io(void)
 321 {
 322         if (cpu_is_at91sam9xe())
 323                 at91sam9xe_map_io();
 324         else if (cpu_is_at91sam9g20())
 325                 at91_init_sram(0, AT91SAM9G20_SRAM_BASE, AT91SAM9G20_SRAM_SIZE);
 326         else
 327                 at91_init_sram(0, AT91SAM9260_SRAM_BASE, AT91SAM9260_SRAM_SIZE);
 328 }
 329
 330 static void __init at91sam9260_ioremap_registers(void)
 331 {
 332         at91_ioremap_shdwc(AT91SAM9260_BASE_SHDWC);
 333         at91_ioremap_rstc(AT91SAM9260_BASE_RSTC);
 334         at91_ioremap_ramc(0, AT91SAM9260_BASE_SDRAMC, 512);
 335         at91sam926x_ioremap_pit(AT91SAM9260_BASE_PIT);
 336         at91sam9_ioremap_smc(0, AT91SAM9260_BASE_SMC);
 337         at91_ioremap_matrix(AT91SAM9260_BASE_MATRIX);
 338 }
 339
 340 static void __init at91sam9260_initialize(void)
 341 {
 342         arm_pm_idle = at91sam9_idle;
 343         arm_pm_restart = at91sam9_alt_restart;
 344         at91_extern_irq = (1 << AT91SAM9260_ID_IRQ0) | (1 << AT91SAM9260_ID_IRQ1)
 345                         | (1 << AT91SAM9260_ID_IRQ2);
 346
 347         /* Register GPIO subsystem */
 348         at91_gpio_init(at91sam9260_gpio, 3);
 349 }
 350
 351 /* --------------------------------------------------------------------
 352  *  Interrupt initialization
 353  * -------------------------------------------------------------------- */
 354
 355 /*
 356  * The default interrupt priority levels (0 = lowest, 7 = highest).
 357  */
 358 static unsigned int at91sam9260_default_irq_priority[NR_AIC_IRQS] __initdata = {
 359         7,      /* Advanced Interrupt Controller */
 360         7,      /* System Peripherals */
 361         1,      /* Parallel IO Controller A */
 362         1,      /* Parallel IO Controller B */
 363         1,      /* Parallel IO Controller C */
 364         0,      /* Analog-to-Digital Converter */
 365         5,      /* USART 0 */
 366         5,      /* USART 1 */
 367         5,      /* USART 2 */
 368         0,      /* Multimedia Card Interface */
 369         2,      /* USB Device Port */
 370         6,      /* Two-Wire Interface */
 371         5,      /* Serial Peripheral Interface 0 */
 372         5,      /* Serial Peripheral Interface 1 */
 373         5,      /* Serial Synchronous Controller */
 374         0,
 375         0,
 376         0,      /* Timer Counter 0 */
 377         0,      /* Timer Counter 1 */
 378         0,      /* Timer Counter 2 */
 379         2,      /* USB Host port */
 380         3,      /* Ethernet */
 381         0,      /* Image Sensor Interface */
 382         5,      /* USART 3 */
 383         5,      /* USART 4 */
 384         5,      /* USART 5 */
 385         0,      /* Timer Counter 3 */
 386         0,      /* Timer Counter 4 */
 387         0,      /* Timer Counter 5 */
 388         0,      /* Advanced Interrupt Controller */
 389         0,      /* Advanced Interrupt Controller */
 390         0,      /* Advanced Interrupt Controller */
 391 };
 392
 393 struct at91_init_soc __initdata at91sam9260_soc = {
 394         .map_io = at91sam9260_map_io,
 395         .default_irq_priority = at91sam9260_default_irq_priority,
 396         .ioremap_registers = at91sam9260_ioremap_registers,
 397         .register_clocks = at91sam9260_register_clocks,
 398         .init = at91sam9260_initialize,
 399 };