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/irq.h>
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18 #include <asm/system_misc.h>
  19 #include <mach/at91rm9200.h>
  20 #include <mach/at91_aic.h>
  21 #include <mach/at91_pmc.h>
  22 #include <mach/at91_st.h>
  23 #include <mach/cpu.h>
  24
  25 #include "soc.h"
  26 #include "generic.h"
  27 #include "clock.h"
  28 #include "sam9_smc.h"
  29
  30 /* --------------------------------------------------------------------
  31  *  Clocks
  32  * -------------------------------------------------------------------- */
  33
  34 /*
  35  * The peripheral clocks.
  36  */
  37 static struct clk udc_clk = {
  38         .name           = "udc_clk",
  39         .pmc_mask       = 1 << AT91RM9200_ID_UDP,
  40         .type           = CLK_TYPE_PERIPHERAL,
  41 };
  42 static struct clk ohci_clk = {
  43         .name           = "ohci_clk",
  44         .pmc_mask       = 1 << AT91RM9200_ID_UHP,
  45         .type           = CLK_TYPE_PERIPHERAL,
  46 };
  47 static struct clk ether_clk = {
  48         .name           = "ether_clk",
  49         .pmc_mask       = 1 << AT91RM9200_ID_EMAC,
  50         .type           = CLK_TYPE_PERIPHERAL,
  51 };
  52 static struct clk mmc_clk = {
  53         .name           = "mci_clk",
  54         .pmc_mask       = 1 << AT91RM9200_ID_MCI,
  55         .type           = CLK_TYPE_PERIPHERAL,
  56 };
  57 static struct clk twi_clk = {
  58         .name           = "twi_clk",
  59         .pmc_mask       = 1 << AT91RM9200_ID_TWI,
  60         .type           = CLK_TYPE_PERIPHERAL,
  61 };
  62 static struct clk usart0_clk = {
  63         .name           = "usart0_clk",
  64         .pmc_mask       = 1 << AT91RM9200_ID_US0,
  65         .type           = CLK_TYPE_PERIPHERAL,
  66 };
  67 static struct clk usart1_clk = {
  68         .name           = "usart1_clk",
  69         .pmc_mask       = 1 << AT91RM9200_ID_US1,
  70         .type           = CLK_TYPE_PERIPHERAL,
  71 };
  72 static struct clk usart2_clk = {
  73         .name           = "usart2_clk",
  74         .pmc_mask       = 1 << AT91RM9200_ID_US2,
  75         .type           = CLK_TYPE_PERIPHERAL,
  76 };
  77 static struct clk usart3_clk = {
  78         .name           = "usart3_clk",
  79         .pmc_mask       = 1 << AT91RM9200_ID_US3,
  80         .type           = CLK_TYPE_PERIPHERAL,
  81 };
  82 static struct clk spi_clk = {
  83         .name           = "spi_clk",
  84         .pmc_mask       = 1 << AT91RM9200_ID_SPI,
  85         .type           = CLK_TYPE_PERIPHERAL,
  86 };
  87 static struct clk pioA_clk = {
  88         .name           = "pioA_clk",
  89         .pmc_mask       = 1 << AT91RM9200_ID_PIOA,
  90         .type           = CLK_TYPE_PERIPHERAL,
  91 };
  92 static struct clk pioB_clk = {
  93         .name           = "pioB_clk",
  94         .pmc_mask       = 1 << AT91RM9200_ID_PIOB,
  95         .type           = CLK_TYPE_PERIPHERAL,
  96 };
  97 static struct clk pioC_clk = {
  98         .name           = "pioC_clk",
  99         .pmc_mask       = 1 << AT91RM9200_ID_PIOC,
 100         .type           = CLK_TYPE_PERIPHERAL,
 101 };
 102 static struct clk pioD_clk = {
 103         .name           = "pioD_clk",
 104         .pmc_mask       = 1 << AT91RM9200_ID_PIOD,
 105         .type           = CLK_TYPE_PERIPHERAL,
 106 };
 107 static struct clk ssc0_clk = {
 108         .name           = "ssc0_clk",
 109         .pmc_mask       = 1 << AT91RM9200_ID_SSC0,
 110         .type           = CLK_TYPE_PERIPHERAL,
 111 };
 112 static struct clk ssc1_clk = {
 113         .name           = "ssc1_clk",
 114         .pmc_mask       = 1 << AT91RM9200_ID_SSC1,
 115         .type           = CLK_TYPE_PERIPHERAL,
 116 };
 117 static struct clk ssc2_clk = {
 118         .name           = "ssc2_clk",
 119         .pmc_mask       = 1 << AT91RM9200_ID_SSC2,
 120         .type           = CLK_TYPE_PERIPHERAL,
 121 };
 122 static struct clk tc0_clk = {
 123         .name           = "tc0_clk",
 124         .pmc_mask       = 1 << AT91RM9200_ID_TC0,
 125         .type           = CLK_TYPE_PERIPHERAL,
 126 };
 127 static struct clk tc1_clk = {
 128         .name           = "tc1_clk",
 129         .pmc_mask       = 1 << AT91RM9200_ID_TC1,
 130         .type           = CLK_TYPE_PERIPHERAL,
 131 };
 132 static struct clk tc2_clk = {
 133         .name           = "tc2_clk",
 134         .pmc_mask       = 1 << AT91RM9200_ID_TC2,
 135         .type           = CLK_TYPE_PERIPHERAL,
 136 };
 137 static struct clk tc3_clk = {
 138         .name           = "tc3_clk",
 139         .pmc_mask       = 1 << AT91RM9200_ID_TC3,
 140         .type           = CLK_TYPE_PERIPHERAL,
 141 };
 142 static struct clk tc4_clk = {
 143         .name           = "tc4_clk",
 144         .pmc_mask       = 1 << AT91RM9200_ID_TC4,
 145         .type           = CLK_TYPE_PERIPHERAL,
 146 };
 147 static struct clk tc5_clk = {
 148         .name           = "tc5_clk",
 149         .pmc_mask       = 1 << AT91RM9200_ID_TC5,
 150         .type           = CLK_TYPE_PERIPHERAL,
 151 };
 152
 153 static struct clk *periph_clocks[] __initdata = {
 154         &pioA_clk,
 155         &pioB_clk,
 156         &pioC_clk,
 157         &pioD_clk,
 158         &usart0_clk,
 159         &usart1_clk,
 160         &usart2_clk,
 161         &usart3_clk,
 162         &mmc_clk,
 163         &udc_clk,
 164         &twi_clk,
 165         &spi_clk,
 166         &ssc0_clk,
 167         &ssc1_clk,
 168         &ssc2_clk,
 169         &tc0_clk,
 170         &tc1_clk,
 171         &tc2_clk,
 172         &tc3_clk,
 173         &tc4_clk,
 174         &tc5_clk,
 175         &ohci_clk,
 176         &ether_clk,
 177         // irq0 .. irq6
 178 };
 179
 180 static struct clk_lookup periph_clocks_lookups[] = {
 181         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
 182         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
 183         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
 184         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tc3_clk),
 185         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk),
 186         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk),
 187         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
 188         CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
 189         CLKDEV_CON_DEV_ID("pclk", "ssc.2", &ssc2_clk),
 190         CLKDEV_CON_DEV_ID(NULL, "i2c-at91rm9200", &twi_clk),
 191         /* fake hclk clock */
 192         CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk),
 193         CLKDEV_CON_ID("pioA", &pioA_clk),
 194         CLKDEV_CON_ID("pioB", &pioB_clk),
 195         CLKDEV_CON_ID("pioC", &pioC_clk),
 196         CLKDEV_CON_ID("pioD", &pioD_clk),
 197 };
 198
 199 static struct clk_lookup usart_clocks_lookups[] = {
 200         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 201         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 202         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 203         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 204         CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
 205 };
 206
 207 /*
 208  * The four programmable clocks.
 209  * You must configure pin multiplexing to bring these signals out.
 210  */
 211 static struct clk pck0 = {
 212         .name           = "pck0",
 213         .pmc_mask       = AT91_PMC_PCK0,
 214         .type           = CLK_TYPE_PROGRAMMABLE,
 215         .id             = 0,
 216 };
 217 static struct clk pck1 = {
 218         .name           = "pck1",
 219         .pmc_mask       = AT91_PMC_PCK1,
 220         .type           = CLK_TYPE_PROGRAMMABLE,
 221         .id             = 1,
 222 };
 223 static struct clk pck2 = {
 224         .name           = "pck2",
 225         .pmc_mask       = AT91_PMC_PCK2,
 226         .type           = CLK_TYPE_PROGRAMMABLE,
 227         .id             = 2,
 228 };
 229 static struct clk pck3 = {
 230         .name           = "pck3",
 231         .pmc_mask       = AT91_PMC_PCK3,
 232         .type           = CLK_TYPE_PROGRAMMABLE,
 233         .id             = 3,
 234 };
 235
 236 static void __init at91rm9200_register_clocks(void)
 237 {
 238         int i;
 239
 240         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 241                 clk_register(periph_clocks[i]);
 242
 243         clkdev_add_table(periph_clocks_lookups,
 244                          ARRAY_SIZE(periph_clocks_lookups));
 245         clkdev_add_table(usart_clocks_lookups,
 246                          ARRAY_SIZE(usart_clocks_lookups));
 247
 248         clk_register(&pck0);
 249         clk_register(&pck1);
 250         clk_register(&pck2);
 251         clk_register(&pck3);
 252 }
 253
 254 /* --------------------------------------------------------------------
 255  *  GPIO
 256  * -------------------------------------------------------------------- */
 257
 258 static struct at91_gpio_bank at91rm9200_gpio[] __initdata = {
 259         {
 260                 .id             = AT91RM9200_ID_PIOA,
 261                 .regbase        = AT91RM9200_BASE_PIOA,
 262         }, {
 263                 .id             = AT91RM9200_ID_PIOB,
 264                 .regbase        = AT91RM9200_BASE_PIOB,
 265         }, {
 266                 .id             = AT91RM9200_ID_PIOC,
 267                 .regbase        = AT91RM9200_BASE_PIOC,
 268         }, {
 269                 .id             = AT91RM9200_ID_PIOD,
 270                 .regbase        = AT91RM9200_BASE_PIOD,
 271         }
 272 };
 273
 274 static void at91rm9200_idle(void)
 275 {
 276         /*
 277          * Disable the processor clock.  The processor will be automatically
 278          * re-enabled by an interrupt or by a reset.
 279          */
 280         at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
 281 }
 282
 283 static void at91rm9200_restart(char mode, const char *cmd)
 284 {
 285         /*
 286          * Perform a hardware reset with the use of the Watchdog timer.
 287          */
 288         at91_st_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
 289         at91_st_write(AT91_ST_CR, AT91_ST_WDRST);
 290 }
 291
 292 /* --------------------------------------------------------------------
 293  *  AT91RM9200 processor initialization
 294  * -------------------------------------------------------------------- */
 295 static void __init at91rm9200_map_io(void)
 296 {
 297         /* Map peripherals */
 298         at91_init_sram(0, AT91RM9200_SRAM_BASE, AT91RM9200_SRAM_SIZE);
 299 }
 300
 301 static void __init at91rm9200_ioremap_registers(void)
 302 {
 303         at91rm9200_ioremap_st(AT91RM9200_BASE_ST);
 304         at91_ioremap_ramc(0, AT91RM9200_BASE_MC, 256);
 305 }
 306
 307 static void __init at91rm9200_initialize(void)
 308 {
 309         arm_pm_idle = at91rm9200_idle;
 310         arm_pm_restart = at91rm9200_restart;
 311         at91_extern_irq = (1 << AT91RM9200_ID_IRQ0) | (1 << AT91RM9200_ID_IRQ1)
 312                         | (1 << AT91RM9200_ID_IRQ2) | (1 << AT91RM9200_ID_IRQ3)
 313                         | (1 << AT91RM9200_ID_IRQ4) | (1 << AT91RM9200_ID_IRQ5)
 314                         | (1 << AT91RM9200_ID_IRQ6);
 315
 316         /* Initialize GPIO subsystem */
 317         at91_gpio_init(at91rm9200_gpio,
 318                 cpu_is_at91rm9200_bga() ? AT91RM9200_BGA : AT91RM9200_PQFP);
 319 }
 320
 321
 322 /* --------------------------------------------------------------------
 323  *  Interrupt initialization
 324  * -------------------------------------------------------------------- */
 325
 326 /*
 327  * The default interrupt priority levels (0 = lowest, 7 = highest).
 328  */
 329 static unsigned int at91rm9200_default_irq_priority[NR_AIC_IRQS] __initdata = {
 330         7,      /* Advanced Interrupt Controller (FIQ) */
 331         7,      /* System Peripherals */
 332         1,      /* Parallel IO Controller A */
 333         1,      /* Parallel IO Controller B */
 334         1,      /* Parallel IO Controller C */
 335         1,      /* Parallel IO Controller D */
 336         5,      /* USART 0 */
 337         5,      /* USART 1 */
 338         5,      /* USART 2 */
 339         5,      /* USART 3 */
 340         0,      /* Multimedia Card Interface */
 341         2,      /* USB Device Port */
 342         6,      /* Two-Wire Interface */
 343         5,      /* Serial Peripheral Interface */
 344         4,      /* Serial Synchronous Controller 0 */
 345         4,      /* Serial Synchronous Controller 1 */
 346         4,      /* Serial Synchronous Controller 2 */
 347         0,      /* Timer Counter 0 */
 348         0,      /* Timer Counter 1 */
 349         0,      /* Timer Counter 2 */
 350         0,      /* Timer Counter 3 */
 351         0,      /* Timer Counter 4 */
 352         0,      /* Timer Counter 5 */
 353         2,      /* USB Host port */
 354         3,      /* Ethernet MAC */
 355         0,      /* Advanced Interrupt Controller (IRQ0) */
 356         0,      /* Advanced Interrupt Controller (IRQ1) */
 357         0,      /* Advanced Interrupt Controller (IRQ2) */
 358         0,      /* Advanced Interrupt Controller (IRQ3) */
 359         0,      /* Advanced Interrupt Controller (IRQ4) */
 360         0,      /* Advanced Interrupt Controller (IRQ5) */
 361         0       /* Advanced Interrupt Controller (IRQ6) */
 362 };
 363
 364 AT91_SOC_START(rm9200)
 365         .map_io = at91rm9200_map_io,
 366         .default_irq_priority = at91rm9200_default_irq_priority,
 367         .ioremap_registers = at91rm9200_ioremap_registers,
 368         .register_clocks = at91rm9200_register_clocks,
 369         .init = at91rm9200_initialize,
 370 AT91_SOC_END