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/irq.h>
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18 #include <mach/cpu.h>
  19 #include <mach/at91_dbgu.h>
  20 #include <mach/at91sam9260.h>
  21 #include <mach/at91_pmc.h>
  22 #include <mach/at91_rstc.h>
  23
  24 #include "soc.h"
  25 #include "generic.h"
  26 #include "clock.h"
  27 #include "sam9_smc.h"
  28
  29 /* --------------------------------------------------------------------
  30  *  Clocks
  31  * -------------------------------------------------------------------- */
  32
  33 /*
  34  * The peripheral clocks.
  35  */
  36 static struct clk pioA_clk = {
  37         .name           = "pioA_clk",
  38         .pmc_mask       = 1 << AT91SAM9260_ID_PIOA,
  39         .type           = CLK_TYPE_PERIPHERAL,
  40 };
  41 static struct clk pioB_clk = {
  42         .name           = "pioB_clk",
  43         .pmc_mask       = 1 << AT91SAM9260_ID_PIOB,
  44         .type           = CLK_TYPE_PERIPHERAL,
  45 };
  46 static struct clk pioC_clk = {
  47         .name           = "pioC_clk",
  48         .pmc_mask       = 1 << AT91SAM9260_ID_PIOC,
  49         .type           = CLK_TYPE_PERIPHERAL,
  50 };
  51 static struct clk adc_clk = {
  52         .name           = "adc_clk",
  53         .pmc_mask       = 1 << AT91SAM9260_ID_ADC,
  54         .type           = CLK_TYPE_PERIPHERAL,
  55 };
  56 static struct clk usart0_clk = {
  57         .name           = "usart0_clk",
  58         .pmc_mask       = 1 << AT91SAM9260_ID_US0,
  59         .type           = CLK_TYPE_PERIPHERAL,
  60 };
  61 static struct clk usart1_clk = {
  62         .name           = "usart1_clk",
  63         .pmc_mask       = 1 << AT91SAM9260_ID_US1,
  64         .type           = CLK_TYPE_PERIPHERAL,
  65 };
  66 static struct clk usart2_clk = {
  67         .name           = "usart2_clk",
  68         .pmc_mask       = 1 << AT91SAM9260_ID_US2,
  69         .type           = CLK_TYPE_PERIPHERAL,
  70 };
  71 static struct clk mmc_clk = {
  72         .name           = "mci_clk",
  73         .pmc_mask       = 1 << AT91SAM9260_ID_MCI,
  74         .type           = CLK_TYPE_PERIPHERAL,
  75 };
  76 static struct clk udc_clk = {
  77         .name           = "udc_clk",
  78         .pmc_mask       = 1 << AT91SAM9260_ID_UDP,
  79         .type           = CLK_TYPE_PERIPHERAL,
  80 };
  81 static struct clk twi_clk = {
  82         .name           = "twi_clk",
  83         .pmc_mask       = 1 << AT91SAM9260_ID_TWI,
  84         .type           = CLK_TYPE_PERIPHERAL,
  85 };
  86 static struct clk spi0_clk = {
  87         .name           = "spi0_clk",
  88         .pmc_mask       = 1 << AT91SAM9260_ID_SPI0,
  89         .type           = CLK_TYPE_PERIPHERAL,
  90 };
  91 static struct clk spi1_clk = {
  92         .name           = "spi1_clk",
  93         .pmc_mask       = 1 << AT91SAM9260_ID_SPI1,
  94         .type           = CLK_TYPE_PERIPHERAL,
  95 };
  96 static struct clk ssc_clk = {
  97         .name           = "ssc_clk",
  98         .pmc_mask       = 1 << AT91SAM9260_ID_SSC,
  99         .type           = CLK_TYPE_PERIPHERAL,
 100 };
 101 static struct clk tc0_clk = {
 102         .name           = "tc0_clk",
 103         .pmc_mask       = 1 << AT91SAM9260_ID_TC0,
 104         .type           = CLK_TYPE_PERIPHERAL,
 105 };
 106 static struct clk tc1_clk = {
 107         .name           = "tc1_clk",
 108         .pmc_mask       = 1 << AT91SAM9260_ID_TC1,
 109         .type           = CLK_TYPE_PERIPHERAL,
 110 };
 111 static struct clk tc2_clk = {
 112         .name           = "tc2_clk",
 113         .pmc_mask       = 1 << AT91SAM9260_ID_TC2,
 114         .type           = CLK_TYPE_PERIPHERAL,
 115 };
 116 static struct clk ohci_clk = {
 117         .name           = "ohci_clk",
 118         .pmc_mask       = 1 << AT91SAM9260_ID_UHP,
 119         .type           = CLK_TYPE_PERIPHERAL,
 120 };
 121 static struct clk macb_clk = {
 122         .name           = "pclk",
 123         .pmc_mask       = 1 << AT91SAM9260_ID_EMAC,
 124         .type           = CLK_TYPE_PERIPHERAL,
 125 };
 126 static struct clk isi_clk = {
 127         .name           = "isi_clk",
 128         .pmc_mask       = 1 << AT91SAM9260_ID_ISI,
 129         .type           = CLK_TYPE_PERIPHERAL,
 130 };
 131 static struct clk usart3_clk = {
 132         .name           = "usart3_clk",
 133         .pmc_mask       = 1 << AT91SAM9260_ID_US3,
 134         .type           = CLK_TYPE_PERIPHERAL,
 135 };
 136 static struct clk usart4_clk = {
 137         .name           = "usart4_clk",
 138         .pmc_mask       = 1 << AT91SAM9260_ID_US4,
 139         .type           = CLK_TYPE_PERIPHERAL,
 140 };
 141 static struct clk usart5_clk = {
 142         .name           = "usart5_clk",
 143         .pmc_mask       = 1 << AT91SAM9260_ID_US5,
 144         .type           = CLK_TYPE_PERIPHERAL,
 145 };
 146 static struct clk tc3_clk = {
 147         .name           = "tc3_clk",
 148         .pmc_mask       = 1 << AT91SAM9260_ID_TC3,
 149         .type           = CLK_TYPE_PERIPHERAL,
 150 };
 151 static struct clk tc4_clk = {
 152         .name           = "tc4_clk",
 153         .pmc_mask       = 1 << AT91SAM9260_ID_TC4,
 154         .type           = CLK_TYPE_PERIPHERAL,
 155 };
 156 static struct clk tc5_clk = {
 157         .name           = "tc5_clk",
 158         .pmc_mask       = 1 << AT91SAM9260_ID_TC5,
 159         .type           = CLK_TYPE_PERIPHERAL,
 160 };
 161
 162 static struct clk *periph_clocks[] __initdata = {
 163         &pioA_clk,
 164         &pioB_clk,
 165         &pioC_clk,
 166         &adc_clk,
 167         &usart0_clk,
 168         &usart1_clk,
 169         &usart2_clk,
 170         &mmc_clk,
 171         &udc_clk,
 172         &twi_clk,
 173         &spi0_clk,
 174         &spi1_clk,
 175         &ssc_clk,
 176         &tc0_clk,
 177         &tc1_clk,
 178         &tc2_clk,
 179         &ohci_clk,
 180         &macb_clk,
 181         &isi_clk,
 182         &usart3_clk,
 183         &usart4_clk,
 184         &usart5_clk,
 185         &tc3_clk,
 186         &tc4_clk,
 187         &tc5_clk,
 188         // irq0 .. irq2
 189 };
 190
 191 static struct clk_lookup periph_clocks_lookups[] = {
 192         /* One additional fake clock for macb_hclk */
 193         CLKDEV_CON_ID("hclk", &macb_clk),
 194         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk),
 195         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.1", &spi1_clk),
 196         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
 197         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
 198         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
 199         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tc3_clk),
 200         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk),
 201         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk),
 202         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc_clk),
 203         /* more usart lookup table for DT entries */
 204         CLKDEV_CON_DEV_ID("usart", "fffff200.serial", &mck),
 205         CLKDEV_CON_DEV_ID("usart", "fffb0000.serial", &usart0_clk),
 206         CLKDEV_CON_DEV_ID("usart", "fffb4000.serial", &usart1_clk),
 207         CLKDEV_CON_DEV_ID("usart", "fffb8000.serial", &usart2_clk),
 208         CLKDEV_CON_DEV_ID("usart", "fffd0000.serial", &usart3_clk),
 209         CLKDEV_CON_DEV_ID("usart", "fffd4000.serial", &usart4_clk),
 210         CLKDEV_CON_DEV_ID("usart", "fffd8000.serial", &usart5_clk),
 211         /* fake hclk clock */
 212         CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk),
 213         CLKDEV_CON_ID("pioA", &pioA_clk),
 214         CLKDEV_CON_ID("pioB", &pioB_clk),
 215         CLKDEV_CON_ID("pioC", &pioC_clk),
 216 };
 217
 218 static struct clk_lookup usart_clocks_lookups[] = {
 219         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 220         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 221         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 222         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 223         CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
 224         CLKDEV_CON_DEV_ID("usart", "atmel_usart.5", &usart4_clk),
 225         CLKDEV_CON_DEV_ID("usart", "atmel_usart.6", &usart5_clk),
 226 };
 227
 228 /*
 229  * The two programmable clocks.
 230  * You must configure pin multiplexing to bring these signals out.
 231  */
 232 static struct clk pck0 = {
 233         .name           = "pck0",
 234         .pmc_mask       = AT91_PMC_PCK0,
 235         .type           = CLK_TYPE_PROGRAMMABLE,
 236         .id             = 0,
 237 };
 238 static struct clk pck1 = {
 239         .name           = "pck1",
 240         .pmc_mask       = AT91_PMC_PCK1,
 241         .type           = CLK_TYPE_PROGRAMMABLE,
 242         .id             = 1,
 243 };
 244
 245 static void __init at91sam9260_register_clocks(void)
 246 {
 247         int i;
 248
 249         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 250                 clk_register(periph_clocks[i]);
 251
 252         clkdev_add_table(periph_clocks_lookups,
 253                          ARRAY_SIZE(periph_clocks_lookups));
 254         clkdev_add_table(usart_clocks_lookups,
 255                          ARRAY_SIZE(usart_clocks_lookups));
 256
 257         clk_register(&pck0);
 258         clk_register(&pck1);
 259 }
 260
 261 static struct clk_lookup console_clock_lookup;
 262
 263 void __init at91sam9260_set_console_clock(int id)
 264 {
 265         if (id >= ARRAY_SIZE(usart_clocks_lookups))
 266                 return;
 267
 268         console_clock_lookup.con_id = "usart";
 269         console_clock_lookup.clk = usart_clocks_lookups[id].clk;
 270         clkdev_add(&console_clock_lookup);
 271 }
 272
 273 /* --------------------------------------------------------------------
 274  *  GPIO
 275  * -------------------------------------------------------------------- */
 276
 277 static struct at91_gpio_bank at91sam9260_gpio[] __initdata = {
 278         {
 279                 .id             = AT91SAM9260_ID_PIOA,
 280                 .regbase        = AT91SAM9260_BASE_PIOA,
 281         }, {
 282                 .id             = AT91SAM9260_ID_PIOB,
 283                 .regbase        = AT91SAM9260_BASE_PIOB,
 284         }, {
 285                 .id             = AT91SAM9260_ID_PIOC,
 286                 .regbase        = AT91SAM9260_BASE_PIOC,
 287         }
 288 };
 289
 290 /* --------------------------------------------------------------------
 291  *  AT91SAM9260 processor initialization
 292  * -------------------------------------------------------------------- */
 293
 294 static void __init at91sam9xe_map_io(void)
 295 {
 296         unsigned long sram_size;
 297
 298         switch (at91_soc_initdata.cidr & AT91_CIDR_SRAMSIZ) {
 299                 case AT91_CIDR_SRAMSIZ_32K:
 300                         sram_size = 2 * SZ_16K;
 301                         break;
 302                 case AT91_CIDR_SRAMSIZ_16K:
 303                 default:
 304                         sram_size = SZ_16K;
 305         }
 306
 307         at91_init_sram(0, AT91SAM9XE_SRAM_BASE, sram_size);
 308 }
 309
 310 static void __init at91sam9260_map_io(void)
 311 {
 312         if (cpu_is_at91sam9xe()) {
 313                 at91sam9xe_map_io();
 314         } else if (cpu_is_at91sam9g20()) {
 315                 at91_init_sram(0, AT91SAM9G20_SRAM0_BASE, AT91SAM9G20_SRAM0_SIZE);
 316                 at91_init_sram(1, AT91SAM9G20_SRAM1_BASE, AT91SAM9G20_SRAM1_SIZE);
 317         } else {
 318                 at91_init_sram(0, AT91SAM9260_SRAM0_BASE, AT91SAM9260_SRAM0_SIZE);
 319                 at91_init_sram(1, AT91SAM9260_SRAM1_BASE, AT91SAM9260_SRAM1_SIZE);
 320         }
 321 }
 322
 323 static void __init at91sam9260_ioremap_registers(void)
 324 {
 325         at91_ioremap_shdwc(AT91SAM9260_BASE_SHDWC);
 326         at91_ioremap_rstc(AT91SAM9260_BASE_RSTC);
 327         at91sam926x_ioremap_pit(AT91SAM9260_BASE_PIT);
 328         at91sam9_ioremap_smc(0, AT91SAM9260_BASE_SMC);
 329 }
 330
 331 static void __init at91sam9260_initialize(void)
 332 {
 333         arm_pm_restart = at91sam9_alt_restart;
 334         at91_extern_irq = (1 << AT91SAM9260_ID_IRQ0) | (1 << AT91SAM9260_ID_IRQ1)
 335                         | (1 << AT91SAM9260_ID_IRQ2);
 336
 337         /* Register GPIO subsystem */
 338         at91_gpio_init(at91sam9260_gpio, 3);
 339 }
 340
 341 /* --------------------------------------------------------------------
 342  *  Interrupt initialization
 343  * -------------------------------------------------------------------- */
 344
 345 /*
 346  * The default interrupt priority levels (0 = lowest, 7 = highest).
 347  */
 348 static unsigned int at91sam9260_default_irq_priority[NR_AIC_IRQS] __initdata = {
 349         7,      /* Advanced Interrupt Controller */
 350         7,      /* System Peripherals */
 351         1,      /* Parallel IO Controller A */
 352         1,      /* Parallel IO Controller B */
 353         1,      /* Parallel IO Controller C */
 354         0,      /* Analog-to-Digital Converter */
 355         5,      /* USART 0 */
 356         5,      /* USART 1 */
 357         5,      /* USART 2 */
 358         0,      /* Multimedia Card Interface */
 359         2,      /* USB Device Port */
 360         6,      /* Two-Wire Interface */
 361         5,      /* Serial Peripheral Interface 0 */
 362         5,      /* Serial Peripheral Interface 1 */
 363         5,      /* Serial Synchronous Controller */
 364         0,
 365         0,
 366         0,      /* Timer Counter 0 */
 367         0,      /* Timer Counter 1 */
 368         0,      /* Timer Counter 2 */
 369         2,      /* USB Host port */
 370         3,      /* Ethernet */
 371         0,      /* Image Sensor Interface */
 372         5,      /* USART 3 */
 373         5,      /* USART 4 */
 374         5,      /* USART 5 */
 375         0,      /* Timer Counter 3 */
 376         0,      /* Timer Counter 4 */
 377         0,      /* Timer Counter 5 */
 378         0,      /* Advanced Interrupt Controller */
 379         0,      /* Advanced Interrupt Controller */
 380         0,      /* Advanced Interrupt Controller */
 381 };
 382
 383 struct at91_init_soc __initdata at91sam9260_soc = {
 384         .map_io = at91sam9260_map_io,
 385         .default_irq_priority = at91sam9260_default_irq_priority,
 386         .ioremap_registers = at91sam9260_ioremap_registers,
 387         .register_clocks = at91sam9260_register_clocks,
 388         .init = at91sam9260_initialize,
 389 };