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
  15 #include <asm/mach/arch.h>
  16 #include <asm/mach/map.h>
  17 #include <mach/at91rm9200.h>
  18 #include <mach/at91_pmc.h>
  19 #include <mach/at91_st.h>
  20
  21 #include "generic.h"
  22 #include "clock.h"
  23
  24 static struct map_desc at91rm9200_io_desc[] __initdata = {
  25         {
  26                 .virtual        = AT91_VA_BASE_SYS,
  27                 .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  28                 .length         = SZ_4K,
  29                 .type           = MT_DEVICE,
  30         }, {
  31                 .virtual        = AT91_VA_BASE_EMAC,
  32                 .pfn            = __phys_to_pfn(AT91RM9200_BASE_EMAC),
  33                 .length         = SZ_16K,
  34                 .type           = MT_DEVICE,
  35         }, {
  36                 .virtual        = AT91_IO_VIRT_BASE - AT91RM9200_SRAM_SIZE,
  37                 .pfn            = __phys_to_pfn(AT91RM9200_SRAM_BASE),
  38                 .length         = AT91RM9200_SRAM_SIZE,
  39                 .type           = MT_DEVICE,
  40         },
  41 };
  42
  43 /* --------------------------------------------------------------------
  44  *  Clocks
  45  * -------------------------------------------------------------------- */
  46
  47 /*
  48  * The peripheral clocks.
  49  */
  50 static struct clk udc_clk = {
  51         .name           = "udc_clk",
  52         .pmc_mask       = 1 << AT91RM9200_ID_UDP,
  53         .type           = CLK_TYPE_PERIPHERAL,
  54 };
  55 static struct clk ohci_clk = {
  56         .name           = "ohci_clk",
  57         .pmc_mask       = 1 << AT91RM9200_ID_UHP,
  58         .type           = CLK_TYPE_PERIPHERAL,
  59 };
  60 static struct clk ether_clk = {
  61         .name           = "ether_clk",
  62         .pmc_mask       = 1 << AT91RM9200_ID_EMAC,
  63         .type           = CLK_TYPE_PERIPHERAL,
  64 };
  65 static struct clk mmc_clk = {
  66         .name           = "mci_clk",
  67         .pmc_mask       = 1 << AT91RM9200_ID_MCI,
  68         .type           = CLK_TYPE_PERIPHERAL,
  69 };
  70 static struct clk twi_clk = {
  71         .name           = "twi_clk",
  72         .pmc_mask       = 1 << AT91RM9200_ID_TWI,
  73         .type           = CLK_TYPE_PERIPHERAL,
  74 };
  75 static struct clk usart0_clk = {
  76         .name           = "usart0_clk",
  77         .pmc_mask       = 1 << AT91RM9200_ID_US0,
  78         .type           = CLK_TYPE_PERIPHERAL,
  79 };
  80 static struct clk usart1_clk = {
  81         .name           = "usart1_clk",
  82         .pmc_mask       = 1 << AT91RM9200_ID_US1,
  83         .type           = CLK_TYPE_PERIPHERAL,
  84 };
  85 static struct clk usart2_clk = {
  86         .name           = "usart2_clk",
  87         .pmc_mask       = 1 << AT91RM9200_ID_US2,
  88         .type           = CLK_TYPE_PERIPHERAL,
  89 };
  90 static struct clk usart3_clk = {
  91         .name           = "usart3_clk",
  92         .pmc_mask       = 1 << AT91RM9200_ID_US3,
  93         .type           = CLK_TYPE_PERIPHERAL,
  94 };
  95 static struct clk spi_clk = {
  96         .name           = "spi_clk",
  97         .pmc_mask       = 1 << AT91RM9200_ID_SPI,
  98         .type           = CLK_TYPE_PERIPHERAL,
  99 };
 100 static struct clk pioA_clk = {
 101         .name           = "pioA_clk",
 102         .pmc_mask       = 1 << AT91RM9200_ID_PIOA,
 103         .type           = CLK_TYPE_PERIPHERAL,
 104 };
 105 static struct clk pioB_clk = {
 106         .name           = "pioB_clk",
 107         .pmc_mask       = 1 << AT91RM9200_ID_PIOB,
 108         .type           = CLK_TYPE_PERIPHERAL,
 109 };
 110 static struct clk pioC_clk = {
 111         .name           = "pioC_clk",
 112         .pmc_mask       = 1 << AT91RM9200_ID_PIOC,
 113         .type           = CLK_TYPE_PERIPHERAL,
 114 };
 115 static struct clk pioD_clk = {
 116         .name           = "pioD_clk",
 117         .pmc_mask       = 1 << AT91RM9200_ID_PIOD,
 118         .type           = CLK_TYPE_PERIPHERAL,
 119 };
 120 static struct clk ssc0_clk = {
 121         .name           = "ssc0_clk",
 122         .pmc_mask       = 1 << AT91RM9200_ID_SSC0,
 123         .type           = CLK_TYPE_PERIPHERAL,
 124 };
 125 static struct clk ssc1_clk = {
 126         .name           = "ssc1_clk",
 127         .pmc_mask       = 1 << AT91RM9200_ID_SSC1,
 128         .type           = CLK_TYPE_PERIPHERAL,
 129 };
 130 static struct clk ssc2_clk = {
 131         .name           = "ssc2_clk",
 132         .pmc_mask       = 1 << AT91RM9200_ID_SSC2,
 133         .type           = CLK_TYPE_PERIPHERAL,
 134 };
 135 static struct clk tc0_clk = {
 136         .name           = "tc0_clk",
 137         .pmc_mask       = 1 << AT91RM9200_ID_TC0,
 138         .type           = CLK_TYPE_PERIPHERAL,
 139 };
 140 static struct clk tc1_clk = {
 141         .name           = "tc1_clk",
 142         .pmc_mask       = 1 << AT91RM9200_ID_TC1,
 143         .type           = CLK_TYPE_PERIPHERAL,
 144 };
 145 static struct clk tc2_clk = {
 146         .name           = "tc2_clk",
 147         .pmc_mask       = 1 << AT91RM9200_ID_TC2,
 148         .type           = CLK_TYPE_PERIPHERAL,
 149 };
 150 static struct clk tc3_clk = {
 151         .name           = "tc3_clk",
 152         .pmc_mask       = 1 << AT91RM9200_ID_TC3,
 153         .type           = CLK_TYPE_PERIPHERAL,
 154 };
 155 static struct clk tc4_clk = {
 156         .name           = "tc4_clk",
 157         .pmc_mask       = 1 << AT91RM9200_ID_TC4,
 158         .type           = CLK_TYPE_PERIPHERAL,
 159 };
 160 static struct clk tc5_clk = {
 161         .name           = "tc5_clk",
 162         .pmc_mask       = 1 << AT91RM9200_ID_TC5,
 163         .type           = CLK_TYPE_PERIPHERAL,
 164 };
 165
 166 static struct clk *periph_clocks[] __initdata = {
 167         &pioA_clk,
 168         &pioB_clk,
 169         &pioC_clk,
 170         &pioD_clk,
 171         &usart0_clk,
 172         &usart1_clk,
 173         &usart2_clk,
 174         &usart3_clk,
 175         &mmc_clk,
 176         &udc_clk,
 177         &twi_clk,
 178         &spi_clk,
 179         &ssc0_clk,
 180         &ssc1_clk,
 181         &ssc2_clk,
 182         &tc0_clk,
 183         &tc1_clk,
 184         &tc2_clk,
 185         &tc3_clk,
 186         &tc4_clk,
 187         &tc5_clk,
 188         &ohci_clk,
 189         &ether_clk,
 190         // irq0 .. irq6
 191 };
 192
 193 /*
 194  * The four programmable clocks.
 195  * You must configure pin multiplexing to bring these signals out.
 196  */
 197 static struct clk pck0 = {
 198         .name           = "pck0",
 199         .pmc_mask       = AT91_PMC_PCK0,
 200         .type           = CLK_TYPE_PROGRAMMABLE,
 201         .id             = 0,
 202 };
 203 static struct clk pck1 = {
 204         .name           = "pck1",
 205         .pmc_mask       = AT91_PMC_PCK1,
 206         .type           = CLK_TYPE_PROGRAMMABLE,
 207         .id             = 1,
 208 };
 209 static struct clk pck2 = {
 210         .name           = "pck2",
 211         .pmc_mask       = AT91_PMC_PCK2,
 212         .type           = CLK_TYPE_PROGRAMMABLE,
 213         .id             = 2,
 214 };
 215 static struct clk pck3 = {
 216         .name           = "pck3",
 217         .pmc_mask       = AT91_PMC_PCK3,
 218         .type           = CLK_TYPE_PROGRAMMABLE,
 219         .id             = 3,
 220 };
 221
 222 static void __init at91rm9200_register_clocks(void)
 223 {
 224         int i;
 225
 226         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 227                 clk_register(periph_clocks[i]);
 228
 229         clk_register(&pck0);
 230         clk_register(&pck1);
 231         clk_register(&pck2);
 232         clk_register(&pck3);
 233 }
 234
 235 /* --------------------------------------------------------------------
 236  *  GPIO
 237  * -------------------------------------------------------------------- */
 238
 239 static struct at91_gpio_bank at91rm9200_gpio[] = {
 240         {
 241                 .id             = AT91RM9200_ID_PIOA,
 242                 .offset         = AT91_PIOA,
 243                 .clock          = &pioA_clk,
 244         }, {
 245                 .id             = AT91RM9200_ID_PIOB,
 246                 .offset         = AT91_PIOB,
 247                 .clock          = &pioB_clk,
 248         }, {
 249                 .id             = AT91RM9200_ID_PIOC,
 250                 .offset         = AT91_PIOC,
 251                 .clock          = &pioC_clk,
 252         }, {
 253                 .id             = AT91RM9200_ID_PIOD,
 254                 .offset         = AT91_PIOD,
 255                 .clock          = &pioD_clk,
 256         }
 257 };
 258
 259 static void at91rm9200_reset(void)
 260 {
 261         /*
 262          * Perform a hardware reset with the use of the Watchdog timer.
 263          */
 264         at91_sys_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
 265         at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
 266 }
 267
 268
 269 /* --------------------------------------------------------------------
 270  *  AT91RM9200 processor initialization
 271  * -------------------------------------------------------------------- */
 272 void __init at91rm9200_initialize(unsigned long main_clock, unsigned short banks)
 273 {
 274         /* Map peripherals */
 275         iotable_init(at91rm9200_io_desc, ARRAY_SIZE(at91rm9200_io_desc));
 276
 277         at91_arch_reset = at91rm9200_reset;
 278         at91_extern_irq = (1 << AT91RM9200_ID_IRQ0) | (1 << AT91RM9200_ID_IRQ1)
 279                         | (1 << AT91RM9200_ID_IRQ2) | (1 << AT91RM9200_ID_IRQ3)
 280                         | (1 << AT91RM9200_ID_IRQ4) | (1 << AT91RM9200_ID_IRQ5)
 281                         | (1 << AT91RM9200_ID_IRQ6);
 282
 283         /* Init clock subsystem */
 284         at91_clock_init(main_clock);
 285
 286         /* Register the processor-specific clocks */
 287         at91rm9200_register_clocks();
 288
 289         /* Initialize GPIO subsystem */
 290         at91_gpio_init(at91rm9200_gpio, banks);
 291 }
 292
 293
 294 /* --------------------------------------------------------------------
 295  *  Interrupt initialization
 296  * -------------------------------------------------------------------- */
 297
 298 /*
 299  * The default interrupt priority levels (0 = lowest, 7 = highest).
 300  */
 301 static unsigned int at91rm9200_default_irq_priority[NR_AIC_IRQS] __initdata = {
 302         7,      /* Advanced Interrupt Controller (FIQ) */
 303         7,      /* System Peripherals */
 304         1,      /* Parallel IO Controller A */
 305         1,      /* Parallel IO Controller B */
 306         1,      /* Parallel IO Controller C */
 307         1,      /* Parallel IO Controller D */
 308         5,      /* USART 0 */
 309         5,      /* USART 1 */
 310         5,      /* USART 2 */
 311         5,      /* USART 3 */
 312         0,      /* Multimedia Card Interface */
 313         2,      /* USB Device Port */
 314         6,      /* Two-Wire Interface */
 315         5,      /* Serial Peripheral Interface */
 316         4,      /* Serial Synchronous Controller 0 */
 317         4,      /* Serial Synchronous Controller 1 */
 318         4,      /* Serial Synchronous Controller 2 */
 319         0,      /* Timer Counter 0 */
 320         0,      /* Timer Counter 1 */
 321         0,      /* Timer Counter 2 */
 322         0,      /* Timer Counter 3 */
 323         0,      /* Timer Counter 4 */
 324         0,      /* Timer Counter 5 */
 325         2,      /* USB Host port */
 326         3,      /* Ethernet MAC */
 327         0,      /* Advanced Interrupt Controller (IRQ0) */
 328         0,      /* Advanced Interrupt Controller (IRQ1) */
 329         0,      /* Advanced Interrupt Controller (IRQ2) */
 330         0,      /* Advanced Interrupt Controller (IRQ3) */
 331         0,      /* Advanced Interrupt Controller (IRQ4) */
 332         0,      /* Advanced Interrupt Controller (IRQ5) */
 333         0       /* Advanced Interrupt Controller (IRQ6) */
 334 };
 335
 336 void __init at91rm9200_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 337 {
 338         if (!priority)
 339                 priority = at91rm9200_default_irq_priority;
 340
 341         /* Initialize the AIC interrupt controller */
 342         at91_aic_init(priority);
 343
 344         /* Enable GPIO interrupts */
 345         at91_gpio_irq_setup();
 346 }