arch/arm/mach-at91/at91rm9200.c

   1 /*
   2  * arch/arm/mach-at91/at91rm9200.c
   3  *
   4  *  Copyright (C) 2005 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/reboot.h>
  15 #include <linux/clk/at91_pmc.h>
  16
  17 #include <asm/irq.h>
  18 #include <asm/mach/arch.h>
  19 #include <asm/mach/map.h>
  20 #include <asm/system_misc.h>
  21 #include <mach/at91rm9200.h>
  22 #include <mach/at91_st.h>
  23 #include <mach/cpu.h>
  24 #include <mach/hardware.h>
  25
  26 #include "at91_aic.h"
  27 #include "soc.h"
  28 #include "generic.h"
  29 #include "sam9_smc.h"
  30 #include "pm.h"
  31
  32 #if defined(CONFIG_OLD_CLK_AT91)
  33 #include "clock.h"
  34 /* --------------------------------------------------------------------
  35  *  Clocks
  36  * -------------------------------------------------------------------- */
  37
  38 /*
  39  * The peripheral clocks.
  40  */
  41 static struct clk udc_clk = {
  42         .name           = "udc_clk",
  43         .pmc_mask       = 1 << AT91RM9200_ID_UDP,
  44         .type           = CLK_TYPE_PERIPHERAL,
  45 };
  46 static struct clk ohci_clk = {
  47         .name           = "ohci_clk",
  48         .pmc_mask       = 1 << AT91RM9200_ID_UHP,
  49         .type           = CLK_TYPE_PERIPHERAL,
  50 };
  51 static struct clk ether_clk = {
  52         .name           = "ether_clk",
  53         .pmc_mask       = 1 << AT91RM9200_ID_EMAC,
  54         .type           = CLK_TYPE_PERIPHERAL,
  55 };
  56 static struct clk mmc_clk = {
  57         .name           = "mci_clk",
  58         .pmc_mask       = 1 << AT91RM9200_ID_MCI,
  59         .type           = CLK_TYPE_PERIPHERAL,
  60 };
  61 static struct clk twi_clk = {
  62         .name           = "twi_clk",
  63         .pmc_mask       = 1 << AT91RM9200_ID_TWI,
  64         .type           = CLK_TYPE_PERIPHERAL,
  65 };
  66 static struct clk usart0_clk = {
  67         .name           = "usart0_clk",
  68         .pmc_mask       = 1 << AT91RM9200_ID_US0,
  69         .type           = CLK_TYPE_PERIPHERAL,
  70 };
  71 static struct clk usart1_clk = {
  72         .name           = "usart1_clk",
  73         .pmc_mask       = 1 << AT91RM9200_ID_US1,
  74         .type           = CLK_TYPE_PERIPHERAL,
  75 };
  76 static struct clk usart2_clk = {
  77         .name           = "usart2_clk",
  78         .pmc_mask       = 1 << AT91RM9200_ID_US2,
  79         .type           = CLK_TYPE_PERIPHERAL,
  80 };
  81 static struct clk usart3_clk = {
  82         .name           = "usart3_clk",
  83         .pmc_mask       = 1 << AT91RM9200_ID_US3,
  84         .type           = CLK_TYPE_PERIPHERAL,
  85 };
  86 static struct clk spi_clk = {
  87         .name           = "spi_clk",
  88         .pmc_mask       = 1 << AT91RM9200_ID_SPI,
  89         .type           = CLK_TYPE_PERIPHERAL,
  90 };
  91 static struct clk pioA_clk = {
  92         .name           = "pioA_clk",
  93         .pmc_mask       = 1 << AT91RM9200_ID_PIOA,
  94         .type           = CLK_TYPE_PERIPHERAL,
  95 };
  96 static struct clk pioB_clk = {
  97         .name           = "pioB_clk",
  98         .pmc_mask       = 1 << AT91RM9200_ID_PIOB,
  99         .type           = CLK_TYPE_PERIPHERAL,
 100 };
 101 static struct clk pioC_clk = {
 102         .name           = "pioC_clk",
 103         .pmc_mask       = 1 << AT91RM9200_ID_PIOC,
 104         .type           = CLK_TYPE_PERIPHERAL,
 105 };
 106 static struct clk pioD_clk = {
 107         .name           = "pioD_clk",
 108         .pmc_mask       = 1 << AT91RM9200_ID_PIOD,
 109         .type           = CLK_TYPE_PERIPHERAL,
 110 };
 111 static struct clk ssc0_clk = {
 112         .name           = "ssc0_clk",
 113         .pmc_mask       = 1 << AT91RM9200_ID_SSC0,
 114         .type           = CLK_TYPE_PERIPHERAL,
 115 };
 116 static struct clk ssc1_clk = {
 117         .name           = "ssc1_clk",
 118         .pmc_mask       = 1 << AT91RM9200_ID_SSC1,
 119         .type           = CLK_TYPE_PERIPHERAL,
 120 };
 121 static struct clk ssc2_clk = {
 122         .name           = "ssc2_clk",
 123         .pmc_mask       = 1 << AT91RM9200_ID_SSC2,
 124         .type           = CLK_TYPE_PERIPHERAL,
 125 };
 126 static struct clk tc0_clk = {
 127         .name           = "tc0_clk",
 128         .pmc_mask       = 1 << AT91RM9200_ID_TC0,
 129         .type           = CLK_TYPE_PERIPHERAL,
 130 };
 131 static struct clk tc1_clk = {
 132         .name           = "tc1_clk",
 133         .pmc_mask       = 1 << AT91RM9200_ID_TC1,
 134         .type           = CLK_TYPE_PERIPHERAL,
 135 };
 136 static struct clk tc2_clk = {
 137         .name           = "tc2_clk",
 138         .pmc_mask       = 1 << AT91RM9200_ID_TC2,
 139         .type           = CLK_TYPE_PERIPHERAL,
 140 };
 141 static struct clk tc3_clk = {
 142         .name           = "tc3_clk",
 143         .pmc_mask       = 1 << AT91RM9200_ID_TC3,
 144         .type           = CLK_TYPE_PERIPHERAL,
 145 };
 146 static struct clk tc4_clk = {
 147         .name           = "tc4_clk",
 148         .pmc_mask       = 1 << AT91RM9200_ID_TC4,
 149         .type           = CLK_TYPE_PERIPHERAL,
 150 };
 151 static struct clk tc5_clk = {
 152         .name           = "tc5_clk",
 153         .pmc_mask       = 1 << AT91RM9200_ID_TC5,
 154         .type           = CLK_TYPE_PERIPHERAL,
 155 };
 156
 157 static struct clk *periph_clocks[] __initdata = {
 158         &pioA_clk,
 159         &pioB_clk,
 160         &pioC_clk,
 161         &pioD_clk,
 162         &usart0_clk,
 163         &usart1_clk,
 164         &usart2_clk,
 165         &usart3_clk,
 166         &mmc_clk,
 167         &udc_clk,
 168         &twi_clk,
 169         &spi_clk,
 170         &ssc0_clk,
 171         &ssc1_clk,
 172         &ssc2_clk,
 173         &tc0_clk,
 174         &tc1_clk,
 175         &tc2_clk,
 176         &tc3_clk,
 177         &tc4_clk,
 178         &tc5_clk,
 179         &ohci_clk,
 180         &ether_clk,
 181         // irq0 .. irq6
 182 };
 183
 184 static struct clk_lookup periph_clocks_lookups[] = {
 185         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
 186         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
 187         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
 188         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tc3_clk),
 189         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk),
 190         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk),
 191         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
 192         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
 193         CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.2", &ssc2_clk),
 194         CLKDEV_CON_DEV_ID("pclk", "fffd0000.ssc", &ssc0_clk),
 195         CLKDEV_CON_DEV_ID("pclk", "fffd4000.ssc", &ssc1_clk),
 196         CLKDEV_CON_DEV_ID("pclk", "fffd8000.ssc", &ssc2_clk),
 197         CLKDEV_CON_DEV_ID(NULL, "i2c-at91rm9200.0", &twi_clk),
 198         /* fake hclk clock */
 199         CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk),
 200         CLKDEV_CON_ID("pioA", &pioA_clk),
 201         CLKDEV_CON_ID("pioB", &pioB_clk),
 202         CLKDEV_CON_ID("pioC", &pioC_clk),
 203         CLKDEV_CON_ID("pioD", &pioD_clk),
 204         /* usart lookup table for DT entries */
 205         CLKDEV_CON_DEV_ID("usart", "fffff200.serial", &mck),
 206         CLKDEV_CON_DEV_ID("usart", "fffc0000.serial", &usart0_clk),
 207         CLKDEV_CON_DEV_ID("usart", "fffc4000.serial", &usart1_clk),
 208         CLKDEV_CON_DEV_ID("usart", "fffc8000.serial", &usart2_clk),
 209         CLKDEV_CON_DEV_ID("usart", "fffcc000.serial", &usart3_clk),
 210         /* tc lookup table for DT entries */
 211         CLKDEV_CON_DEV_ID("t0_clk", "fffa0000.timer", &tc0_clk),
 212         CLKDEV_CON_DEV_ID("t1_clk", "fffa0000.timer", &tc1_clk),
 213         CLKDEV_CON_DEV_ID("t2_clk", "fffa0000.timer", &tc2_clk),
 214         CLKDEV_CON_DEV_ID("t0_clk", "fffa4000.timer", &tc3_clk),
 215         CLKDEV_CON_DEV_ID("t1_clk", "fffa4000.timer", &tc4_clk),
 216         CLKDEV_CON_DEV_ID("t2_clk", "fffa4000.timer", &tc5_clk),
 217         CLKDEV_CON_DEV_ID("mci_clk", "fffb4000.mmc", &mmc_clk),
 218         CLKDEV_CON_DEV_ID("emac_clk", "fffbc000.ethernet", &ether_clk),
 219         CLKDEV_CON_DEV_ID(NULL, "fffb8000.i2c", &twi_clk),
 220         CLKDEV_CON_DEV_ID("hclk", "300000.ohci", &ohci_clk),
 221         CLKDEV_CON_DEV_ID(NULL, "fffff400.gpio", &pioA_clk),
 222         CLKDEV_CON_DEV_ID(NULL, "fffff600.gpio", &pioB_clk),
 223         CLKDEV_CON_DEV_ID(NULL, "fffff800.gpio", &pioC_clk),
 224         CLKDEV_CON_DEV_ID(NULL, "fffffa00.gpio", &pioD_clk),
 225 };
 226
 227 static struct clk_lookup usart_clocks_lookups[] = {
 228         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 229         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 230         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 231         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 232         CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
 233 };
 234
 235 /*
 236  * The four programmable clocks.
 237  * You must configure pin multiplexing to bring these signals out.
 238  */
 239 static struct clk pck0 = {
 240         .name           = "pck0",
 241         .pmc_mask       = AT91_PMC_PCK0,
 242         .type           = CLK_TYPE_PROGRAMMABLE,
 243         .id             = 0,
 244 };
 245 static struct clk pck1 = {
 246         .name           = "pck1",
 247         .pmc_mask       = AT91_PMC_PCK1,
 248         .type           = CLK_TYPE_PROGRAMMABLE,
 249         .id             = 1,
 250 };
 251 static struct clk pck2 = {
 252         .name           = "pck2",
 253         .pmc_mask       = AT91_PMC_PCK2,
 254         .type           = CLK_TYPE_PROGRAMMABLE,
 255         .id             = 2,
 256 };
 257 static struct clk pck3 = {
 258         .name           = "pck3",
 259         .pmc_mask       = AT91_PMC_PCK3,
 260         .type           = CLK_TYPE_PROGRAMMABLE,
 261         .id             = 3,
 262 };
 263
 264 static void __init at91rm9200_register_clocks(void)
 265 {
 266         int i;
 267
 268         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 269                 clk_register(periph_clocks[i]);
 270
 271         clkdev_add_table(periph_clocks_lookups,
 272                          ARRAY_SIZE(periph_clocks_lookups));
 273         clkdev_add_table(usart_clocks_lookups,
 274                          ARRAY_SIZE(usart_clocks_lookups));
 275
 276         clk_register(&pck0);
 277         clk_register(&pck1);
 278         clk_register(&pck2);
 279         clk_register(&pck3);
 280 }
 281 #else
 282 #define at91rm9200_register_clocks NULL
 283 #endif
 284
 285 /* --------------------------------------------------------------------
 286  *  GPIO
 287  * -------------------------------------------------------------------- */
 288
 289 static struct at91_gpio_bank at91rm9200_gpio[] __initdata = {
 290         {
 291                 .id             = AT91RM9200_ID_PIOA,
 292                 .regbase        = AT91RM9200_BASE_PIOA,
 293         }, {
 294                 .id             = AT91RM9200_ID_PIOB,
 295                 .regbase        = AT91RM9200_BASE_PIOB,
 296         }, {
 297                 .id             = AT91RM9200_ID_PIOC,
 298                 .regbase        = AT91RM9200_BASE_PIOC,
 299         }, {
 300                 .id             = AT91RM9200_ID_PIOD,
 301                 .regbase        = AT91RM9200_BASE_PIOD,
 302         }
 303 };
 304
 305 static void at91rm9200_idle(void)
 306 {
 307         /*
 308          * Disable the processor clock.  The processor will be automatically
 309          * re-enabled by an interrupt or by a reset.
 310          */
 311         at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
 312 }
 313
 314 static void at91rm9200_restart(enum reboot_mode reboot_mode, const char *cmd)
 315 {
 316         /*
 317          * Perform a hardware reset with the use of the Watchdog timer.
 318          */
 319         at91_st_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
 320         at91_st_write(AT91_ST_CR, AT91_ST_WDRST);
 321 }
 322
 323 /* --------------------------------------------------------------------
 324  *  AT91RM9200 processor initialization
 325  * -------------------------------------------------------------------- */
 326 static void __init at91rm9200_map_io(void)
 327 {
 328         /* Map peripherals */
 329         at91_init_sram(0, AT91RM9200_SRAM_BASE, AT91RM9200_SRAM_SIZE);
 330 }
 331
 332 static void __init at91rm9200_ioremap_registers(void)
 333 {
 334         at91rm9200_ioremap_st(AT91RM9200_BASE_ST);
 335         at91_ioremap_ramc(0, AT91RM9200_BASE_MC, 256);
 336         at91_pm_set_standby(at91rm9200_standby);
 337 }
 338
 339 static void __init at91rm9200_initialize(void)
 340 {
 341         arm_pm_idle = at91rm9200_idle;
 342         arm_pm_restart = at91rm9200_restart;
 343
 344         /* Initialize GPIO subsystem */
 345         at91_gpio_init(at91rm9200_gpio,
 346                 cpu_is_at91rm9200_bga() ? AT91RM9200_BGA : AT91RM9200_PQFP);
 347 }
 348
 349
 350 /* --------------------------------------------------------------------
 351  *  Interrupt initialization
 352  * -------------------------------------------------------------------- */
 353
 354 /*
 355  * The default interrupt priority levels (0 = lowest, 7 = highest).
 356  */
 357 static unsigned int at91rm9200_default_irq_priority[NR_AIC_IRQS] __initdata = {
 358         7,      /* Advanced Interrupt Controller (FIQ) */
 359         7,      /* System Peripherals */
 360         1,      /* Parallel IO Controller A */
 361         1,      /* Parallel IO Controller B */
 362         1,      /* Parallel IO Controller C */
 363         1,      /* Parallel IO Controller D */
 364         5,      /* USART 0 */
 365         5,      /* USART 1 */
 366         5,      /* USART 2 */
 367         5,      /* USART 3 */
 368         0,      /* Multimedia Card Interface */
 369         2,      /* USB Device Port */
 370         6,      /* Two-Wire Interface */
 371         5,      /* Serial Peripheral Interface */
 372         4,      /* Serial Synchronous Controller 0 */
 373         4,      /* Serial Synchronous Controller 1 */
 374         4,      /* Serial Synchronous Controller 2 */
 375         0,      /* Timer Counter 0 */
 376         0,      /* Timer Counter 1 */
 377         0,      /* Timer Counter 2 */
 378         0,      /* Timer Counter 3 */
 379         0,      /* Timer Counter 4 */
 380         0,      /* Timer Counter 5 */
 381         2,      /* USB Host port */
 382         3,      /* Ethernet MAC */
 383         0,      /* Advanced Interrupt Controller (IRQ0) */
 384         0,      /* Advanced Interrupt Controller (IRQ1) */
 385         0,      /* Advanced Interrupt Controller (IRQ2) */
 386         0,      /* Advanced Interrupt Controller (IRQ3) */
 387         0,      /* Advanced Interrupt Controller (IRQ4) */
 388         0,      /* Advanced Interrupt Controller (IRQ5) */
 389         0       /* Advanced Interrupt Controller (IRQ6) */
 390 };
 391
 392 AT91_SOC_START(at91rm9200)
 393         .map_io = at91rm9200_map_io,
 394         .default_irq_priority = at91rm9200_default_irq_priority,
 395         .extern_irq = (1 << AT91RM9200_ID_IRQ0) | (1 << AT91RM9200_ID_IRQ1)
 396                     | (1 << AT91RM9200_ID_IRQ2) | (1 << AT91RM9200_ID_IRQ3)
 397                     | (1 << AT91RM9200_ID_IRQ4) | (1 << AT91RM9200_ID_IRQ5)
 398                     | (1 << AT91RM9200_ID_IRQ6),
 399         .ioremap_registers = at91rm9200_ioremap_registers,
 400         .register_clocks = at91rm9200_register_clocks,
 401         .init = at91rm9200_initialize,
 402 AT91_SOC_END