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 <mach/at91rm9200.h>
  19 #include <mach/at91_pmc.h>
  20 #include <mach/at91_st.h>
  21 #include <mach/cpu.h>
  22
  23 #include "soc.h"
  24 #include "generic.h"
  25 #include "clock.h"
  26 #include "sam9_smc.h"
  27
  28 static struct map_desc at91rm9200_io_desc[] __initdata = {
  29         {
  30                 .virtual        = AT91_VA_BASE_EMAC,
  31                 .pfn            = __phys_to_pfn(AT91RM9200_BASE_EMAC),
  32                 .length         = SZ_16K,
  33                 .type           = MT_DEVICE,
  34         },
  35 };
  36
  37 /* --------------------------------------------------------------------
  38  *  Clocks
  39  * -------------------------------------------------------------------- */
  40
  41 /*
  42  * The peripheral clocks.
  43  */
  44 static struct clk udc_clk = {
  45         .name           = "udc_clk",
  46         .pmc_mask       = 1 << AT91RM9200_ID_UDP,
  47         .type           = CLK_TYPE_PERIPHERAL,
  48 };
  49 static struct clk ohci_clk = {
  50         .name           = "ohci_clk",
  51         .pmc_mask       = 1 << AT91RM9200_ID_UHP,
  52         .type           = CLK_TYPE_PERIPHERAL,
  53 };
  54 static struct clk ether_clk = {
  55         .name           = "ether_clk",
  56         .pmc_mask       = 1 << AT91RM9200_ID_EMAC,
  57         .type           = CLK_TYPE_PERIPHERAL,
  58 };
  59 static struct clk mmc_clk = {
  60         .name           = "mci_clk",
  61         .pmc_mask       = 1 << AT91RM9200_ID_MCI,
  62         .type           = CLK_TYPE_PERIPHERAL,
  63 };
  64 static struct clk twi_clk = {
  65         .name           = "twi_clk",
  66         .pmc_mask       = 1 << AT91RM9200_ID_TWI,
  67         .type           = CLK_TYPE_PERIPHERAL,
  68 };
  69 static struct clk usart0_clk = {
  70         .name           = "usart0_clk",
  71         .pmc_mask       = 1 << AT91RM9200_ID_US0,
  72         .type           = CLK_TYPE_PERIPHERAL,
  73 };
  74 static struct clk usart1_clk = {
  75         .name           = "usart1_clk",
  76         .pmc_mask       = 1 << AT91RM9200_ID_US1,
  77         .type           = CLK_TYPE_PERIPHERAL,
  78 };
  79 static struct clk usart2_clk = {
  80         .name           = "usart2_clk",
  81         .pmc_mask       = 1 << AT91RM9200_ID_US2,
  82         .type           = CLK_TYPE_PERIPHERAL,
  83 };
  84 static struct clk usart3_clk = {
  85         .name           = "usart3_clk",
  86         .pmc_mask       = 1 << AT91RM9200_ID_US3,
  87         .type           = CLK_TYPE_PERIPHERAL,
  88 };
  89 static struct clk spi_clk = {
  90         .name           = "spi_clk",
  91         .pmc_mask       = 1 << AT91RM9200_ID_SPI,
  92         .type           = CLK_TYPE_PERIPHERAL,
  93 };
  94 static struct clk pioA_clk = {
  95         .name           = "pioA_clk",
  96         .pmc_mask       = 1 << AT91RM9200_ID_PIOA,
  97         .type           = CLK_TYPE_PERIPHERAL,
  98 };
  99 static struct clk pioB_clk = {
 100         .name           = "pioB_clk",
 101         .pmc_mask       = 1 << AT91RM9200_ID_PIOB,
 102         .type           = CLK_TYPE_PERIPHERAL,
 103 };
 104 static struct clk pioC_clk = {
 105         .name           = "pioC_clk",
 106         .pmc_mask       = 1 << AT91RM9200_ID_PIOC,
 107         .type           = CLK_TYPE_PERIPHERAL,
 108 };
 109 static struct clk pioD_clk = {
 110         .name           = "pioD_clk",
 111         .pmc_mask       = 1 << AT91RM9200_ID_PIOD,
 112         .type           = CLK_TYPE_PERIPHERAL,
 113 };
 114 static struct clk ssc0_clk = {
 115         .name           = "ssc0_clk",
 116         .pmc_mask       = 1 << AT91RM9200_ID_SSC0,
 117         .type           = CLK_TYPE_PERIPHERAL,
 118 };
 119 static struct clk ssc1_clk = {
 120         .name           = "ssc1_clk",
 121         .pmc_mask       = 1 << AT91RM9200_ID_SSC1,
 122         .type           = CLK_TYPE_PERIPHERAL,
 123 };
 124 static struct clk ssc2_clk = {
 125         .name           = "ssc2_clk",
 126         .pmc_mask       = 1 << AT91RM9200_ID_SSC2,
 127         .type           = CLK_TYPE_PERIPHERAL,
 128 };
 129 static struct clk tc0_clk = {
 130         .name           = "tc0_clk",
 131         .pmc_mask       = 1 << AT91RM9200_ID_TC0,
 132         .type           = CLK_TYPE_PERIPHERAL,
 133 };
 134 static struct clk tc1_clk = {
 135         .name           = "tc1_clk",
 136         .pmc_mask       = 1 << AT91RM9200_ID_TC1,
 137         .type           = CLK_TYPE_PERIPHERAL,
 138 };
 139 static struct clk tc2_clk = {
 140         .name           = "tc2_clk",
 141         .pmc_mask       = 1 << AT91RM9200_ID_TC2,
 142         .type           = CLK_TYPE_PERIPHERAL,
 143 };
 144 static struct clk tc3_clk = {
 145         .name           = "tc3_clk",
 146         .pmc_mask       = 1 << AT91RM9200_ID_TC3,
 147         .type           = CLK_TYPE_PERIPHERAL,
 148 };
 149 static struct clk tc4_clk = {
 150         .name           = "tc4_clk",
 151         .pmc_mask       = 1 << AT91RM9200_ID_TC4,
 152         .type           = CLK_TYPE_PERIPHERAL,
 153 };
 154 static struct clk tc5_clk = {
 155         .name           = "tc5_clk",
 156         .pmc_mask       = 1 << AT91RM9200_ID_TC5,
 157         .type           = CLK_TYPE_PERIPHERAL,
 158 };
 159
 160 static struct clk *periph_clocks[] __initdata = {
 161         &pioA_clk,
 162         &pioB_clk,
 163         &pioC_clk,
 164         &pioD_clk,
 165         &usart0_clk,
 166         &usart1_clk,
 167         &usart2_clk,
 168         &usart3_clk,
 169         &mmc_clk,
 170         &udc_clk,
 171         &twi_clk,
 172         &spi_clk,
 173         &ssc0_clk,
 174         &ssc1_clk,
 175         &ssc2_clk,
 176         &tc0_clk,
 177         &tc1_clk,
 178         &tc2_clk,
 179         &tc3_clk,
 180         &tc4_clk,
 181         &tc5_clk,
 182         &ohci_clk,
 183         &ether_clk,
 184         // irq0 .. irq6
 185 };
 186
 187 static struct clk_lookup periph_clocks_lookups[] = {
 188         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
 189         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
 190         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
 191         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tc3_clk),
 192         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk),
 193         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk),
 194         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
 195         CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
 196         CLKDEV_CON_DEV_ID("pclk", "ssc.2", &ssc2_clk),
 197         /* fake hclk clock */
 198         CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk),
 199         CLKDEV_CON_ID("pioA", &pioA_clk),
 200         CLKDEV_CON_ID("pioB", &pioB_clk),
 201         CLKDEV_CON_ID("pioC", &pioC_clk),
 202         CLKDEV_CON_ID("pioD", &pioD_clk),
 203 };
 204
 205 static struct clk_lookup usart_clocks_lookups[] = {
 206         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 207         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 208         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 209         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 210         CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
 211 };
 212
 213 /*
 214  * The four programmable clocks.
 215  * You must configure pin multiplexing to bring these signals out.
 216  */
 217 static struct clk pck0 = {
 218         .name           = "pck0",
 219         .pmc_mask       = AT91_PMC_PCK0,
 220         .type           = CLK_TYPE_PROGRAMMABLE,
 221         .id             = 0,
 222 };
 223 static struct clk pck1 = {
 224         .name           = "pck1",
 225         .pmc_mask       = AT91_PMC_PCK1,
 226         .type           = CLK_TYPE_PROGRAMMABLE,
 227         .id             = 1,
 228 };
 229 static struct clk pck2 = {
 230         .name           = "pck2",
 231         .pmc_mask       = AT91_PMC_PCK2,
 232         .type           = CLK_TYPE_PROGRAMMABLE,
 233         .id             = 2,
 234 };
 235 static struct clk pck3 = {
 236         .name           = "pck3",
 237         .pmc_mask       = AT91_PMC_PCK3,
 238         .type           = CLK_TYPE_PROGRAMMABLE,
 239         .id             = 3,
 240 };
 241
 242 static void __init at91rm9200_register_clocks(void)
 243 {
 244         int i;
 245
 246         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 247                 clk_register(periph_clocks[i]);
 248
 249         clkdev_add_table(periph_clocks_lookups,
 250                          ARRAY_SIZE(periph_clocks_lookups));
 251         clkdev_add_table(usart_clocks_lookups,
 252                          ARRAY_SIZE(usart_clocks_lookups));
 253
 254         clk_register(&pck0);
 255         clk_register(&pck1);
 256         clk_register(&pck2);
 257         clk_register(&pck3);
 258 }
 259
 260 static struct clk_lookup console_clock_lookup;
 261
 262 void __init at91rm9200_set_console_clock(int id)
 263 {
 264         if (id >= ARRAY_SIZE(usart_clocks_lookups))
 265                 return;
 266
 267         console_clock_lookup.con_id = "usart";
 268         console_clock_lookup.clk = usart_clocks_lookups[id].clk;
 269         clkdev_add(&console_clock_lookup);
 270 }
 271
 272 /* --------------------------------------------------------------------
 273  *  GPIO
 274  * -------------------------------------------------------------------- */
 275
 276 static struct at91_gpio_bank at91rm9200_gpio[] __initdata = {
 277         {
 278                 .id             = AT91RM9200_ID_PIOA,
 279                 .regbase        = AT91RM9200_BASE_PIOA,
 280         }, {
 281                 .id             = AT91RM9200_ID_PIOB,
 282                 .regbase        = AT91RM9200_BASE_PIOB,
 283         }, {
 284                 .id             = AT91RM9200_ID_PIOC,
 285                 .regbase        = AT91RM9200_BASE_PIOC,
 286         }, {
 287                 .id             = AT91RM9200_ID_PIOD,
 288                 .regbase        = AT91RM9200_BASE_PIOD,
 289         }
 290 };
 291
 292 static void at91rm9200_restart(char mode, const char *cmd)
 293 {
 294         /*
 295          * Perform a hardware reset with the use of the Watchdog timer.
 296          */
 297         at91_sys_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
 298         at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
 299 }
 300
 301 /* --------------------------------------------------------------------
 302  *  AT91RM9200 processor initialization
 303  * -------------------------------------------------------------------- */
 304 static void __init at91rm9200_map_io(void)
 305 {
 306         /* Map peripherals */
 307         at91_init_sram(0, AT91RM9200_SRAM_BASE, AT91RM9200_SRAM_SIZE);
 308         iotable_init(at91rm9200_io_desc, ARRAY_SIZE(at91rm9200_io_desc));
 309 }
 310
 311 static void __init at91rm9200_ioremap_registers(void)
 312 {
 313 }
 314
 315 static void __init at91rm9200_initialize(void)
 316 {
 317         arm_pm_restart = at91rm9200_restart;
 318         at91_extern_irq = (1 << AT91RM9200_ID_IRQ0) | (1 << AT91RM9200_ID_IRQ1)
 319                         | (1 << AT91RM9200_ID_IRQ2) | (1 << AT91RM9200_ID_IRQ3)
 320                         | (1 << AT91RM9200_ID_IRQ4) | (1 << AT91RM9200_ID_IRQ5)
 321                         | (1 << AT91RM9200_ID_IRQ6);
 322
 323         /* Initialize GPIO subsystem */
 324         at91_gpio_init(at91rm9200_gpio,
 325                 cpu_is_at91rm9200_bga() ? AT91RM9200_BGA : AT91RM9200_PQFP);
 326 }
 327
 328
 329 /* --------------------------------------------------------------------
 330  *  Interrupt initialization
 331  * -------------------------------------------------------------------- */
 332
 333 /*
 334  * The default interrupt priority levels (0 = lowest, 7 = highest).
 335  */
 336 static unsigned int at91rm9200_default_irq_priority[NR_AIC_IRQS] __initdata = {
 337         7,      /* Advanced Interrupt Controller (FIQ) */
 338         7,      /* System Peripherals */
 339         1,      /* Parallel IO Controller A */
 340         1,      /* Parallel IO Controller B */
 341         1,      /* Parallel IO Controller C */
 342         1,      /* Parallel IO Controller D */
 343         5,      /* USART 0 */
 344         5,      /* USART 1 */
 345         5,      /* USART 2 */
 346         5,      /* USART 3 */
 347         0,      /* Multimedia Card Interface */
 348         2,      /* USB Device Port */
 349         6,      /* Two-Wire Interface */
 350         5,      /* Serial Peripheral Interface */
 351         4,      /* Serial Synchronous Controller 0 */
 352         4,      /* Serial Synchronous Controller 1 */
 353         4,      /* Serial Synchronous Controller 2 */
 354         0,      /* Timer Counter 0 */
 355         0,      /* Timer Counter 1 */
 356         0,      /* Timer Counter 2 */
 357         0,      /* Timer Counter 3 */
 358         0,      /* Timer Counter 4 */
 359         0,      /* Timer Counter 5 */
 360         2,      /* USB Host port */
 361         3,      /* Ethernet MAC */
 362         0,      /* Advanced Interrupt Controller (IRQ0) */
 363         0,      /* Advanced Interrupt Controller (IRQ1) */
 364         0,      /* Advanced Interrupt Controller (IRQ2) */
 365         0,      /* Advanced Interrupt Controller (IRQ3) */
 366         0,      /* Advanced Interrupt Controller (IRQ4) */
 367         0,      /* Advanced Interrupt Controller (IRQ5) */
 368         0       /* Advanced Interrupt Controller (IRQ6) */
 369 };
 370
 371 struct at91_init_soc __initdata at91rm9200_soc = {
 372         .map_io = at91rm9200_map_io,
 373         .default_irq_priority = at91rm9200_default_irq_priority,
 374         .ioremap_registers = at91rm9200_ioremap_registers,
 375         .register_clocks = at91rm9200_register_clocks,
 376         .init = at91rm9200_initialize,
 377 };