arch/arm/mach-at91/at91sam9261.c

   1 /*
   2  * arch/arm/mach-at91/at91sam9261.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/pm.h>
  15
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18 #include <asm/arch/at91sam9261.h>
  19 #include <asm/arch/at91_pmc.h>
  20 #include <asm/arch/at91_rstc.h>
  21 #include <asm/arch/at91_shdwc.h>
  22
  23 #include "generic.h"
  24 #include "clock.h"
  25
  26 static struct map_desc at91sam9261_io_desc[] __initdata = {
  27         {
  28                 .virtual        = AT91_VA_BASE_SYS,
  29                 .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  30                 .length         = SZ_16K,
  31                 .type           = MT_DEVICE,
  32         }, {
  33                 .virtual        = AT91_IO_VIRT_BASE - AT91SAM9261_SRAM_SIZE,
  34                 .pfn            = __phys_to_pfn(AT91SAM9261_SRAM_BASE),
  35                 .length         = AT91SAM9261_SRAM_SIZE,
  36                 .type           = MT_DEVICE,
  37         },
  38 };
  39
  40 /* --------------------------------------------------------------------
  41  *  Clocks
  42  * -------------------------------------------------------------------- */
  43
  44 /*
  45  * The peripheral clocks.
  46  */
  47 static struct clk pioA_clk = {
  48         .name           = "pioA_clk",
  49         .pmc_mask       = 1 << AT91SAM9261_ID_PIOA,
  50         .type           = CLK_TYPE_PERIPHERAL,
  51 };
  52 static struct clk pioB_clk = {
  53         .name           = "pioB_clk",
  54         .pmc_mask       = 1 << AT91SAM9261_ID_PIOB,
  55         .type           = CLK_TYPE_PERIPHERAL,
  56 };
  57 static struct clk pioC_clk = {
  58         .name           = "pioC_clk",
  59         .pmc_mask       = 1 << AT91SAM9261_ID_PIOC,
  60         .type           = CLK_TYPE_PERIPHERAL,
  61 };
  62 static struct clk usart0_clk = {
  63         .name           = "usart0_clk",
  64         .pmc_mask       = 1 << AT91SAM9261_ID_US0,
  65         .type           = CLK_TYPE_PERIPHERAL,
  66 };
  67 static struct clk usart1_clk = {
  68         .name           = "usart1_clk",
  69         .pmc_mask       = 1 << AT91SAM9261_ID_US1,
  70         .type           = CLK_TYPE_PERIPHERAL,
  71 };
  72 static struct clk usart2_clk = {
  73         .name           = "usart2_clk",
  74         .pmc_mask       = 1 << AT91SAM9261_ID_US2,
  75         .type           = CLK_TYPE_PERIPHERAL,
  76 };
  77 static struct clk mmc_clk = {
  78         .name           = "mci_clk",
  79         .pmc_mask       = 1 << AT91SAM9261_ID_MCI,
  80         .type           = CLK_TYPE_PERIPHERAL,
  81 };
  82 static struct clk udc_clk = {
  83         .name           = "udc_clk",
  84         .pmc_mask       = 1 << AT91SAM9261_ID_UDP,
  85         .type           = CLK_TYPE_PERIPHERAL,
  86 };
  87 static struct clk twi_clk = {
  88         .name           = "twi_clk",
  89         .pmc_mask       = 1 << AT91SAM9261_ID_TWI,
  90         .type           = CLK_TYPE_PERIPHERAL,
  91 };
  92 static struct clk spi0_clk = {
  93         .name           = "spi0_clk",
  94         .pmc_mask       = 1 << AT91SAM9261_ID_SPI0,
  95         .type           = CLK_TYPE_PERIPHERAL,
  96 };
  97 static struct clk spi1_clk = {
  98         .name           = "spi1_clk",
  99         .pmc_mask       = 1 << AT91SAM9261_ID_SPI1,
 100         .type           = CLK_TYPE_PERIPHERAL,
 101 };
 102 static struct clk ssc0_clk = {
 103         .name           = "ssc0_clk",
 104         .pmc_mask       = 1 << AT91SAM9261_ID_SSC0,
 105         .type           = CLK_TYPE_PERIPHERAL,
 106 };
 107 static struct clk ssc1_clk = {
 108         .name           = "ssc1_clk",
 109         .pmc_mask       = 1 << AT91SAM9261_ID_SSC1,
 110         .type           = CLK_TYPE_PERIPHERAL,
 111 };
 112 static struct clk ssc2_clk = {
 113         .name           = "ssc2_clk",
 114         .pmc_mask       = 1 << AT91SAM9261_ID_SSC2,
 115         .type           = CLK_TYPE_PERIPHERAL,
 116 };
 117 static struct clk tc0_clk = {
 118         .name           = "tc0_clk",
 119         .pmc_mask       = 1 << AT91SAM9261_ID_TC0,
 120         .type           = CLK_TYPE_PERIPHERAL,
 121 };
 122 static struct clk tc1_clk = {
 123         .name           = "tc1_clk",
 124         .pmc_mask       = 1 << AT91SAM9261_ID_TC1,
 125         .type           = CLK_TYPE_PERIPHERAL,
 126 };
 127 static struct clk tc2_clk = {
 128         .name           = "tc2_clk",
 129         .pmc_mask       = 1 << AT91SAM9261_ID_TC2,
 130         .type           = CLK_TYPE_PERIPHERAL,
 131 };
 132 static struct clk ohci_clk = {
 133         .name           = "ohci_clk",
 134         .pmc_mask       = 1 << AT91SAM9261_ID_UHP,
 135         .type           = CLK_TYPE_PERIPHERAL,
 136 };
 137 static struct clk lcdc_clk = {
 138         .name           = "lcdc_clk",
 139         .pmc_mask       = 1 << AT91SAM9261_ID_LCDC,
 140         .type           = CLK_TYPE_PERIPHERAL,
 141 };
 142
 143 static struct clk *periph_clocks[] __initdata = {
 144         &pioA_clk,
 145         &pioB_clk,
 146         &pioC_clk,
 147         &usart0_clk,
 148         &usart1_clk,
 149         &usart2_clk,
 150         &mmc_clk,
 151         &udc_clk,
 152         &twi_clk,
 153         &spi0_clk,
 154         &spi1_clk,
 155         &ssc0_clk,
 156         &ssc1_clk,
 157         &ssc2_clk,
 158         &tc0_clk,
 159         &tc1_clk,
 160         &tc2_clk,
 161         &ohci_clk,
 162         &lcdc_clk,
 163         // irq0 .. irq2
 164 };
 165
 166 /*
 167  * The four programmable clocks.
 168  * You must configure pin multiplexing to bring these signals out.
 169  */
 170 static struct clk pck0 = {
 171         .name           = "pck0",
 172         .pmc_mask       = AT91_PMC_PCK0,
 173         .type           = CLK_TYPE_PROGRAMMABLE,
 174         .id             = 0,
 175 };
 176 static struct clk pck1 = {
 177         .name           = "pck1",
 178         .pmc_mask       = AT91_PMC_PCK1,
 179         .type           = CLK_TYPE_PROGRAMMABLE,
 180         .id             = 1,
 181 };
 182 static struct clk pck2 = {
 183         .name           = "pck2",
 184         .pmc_mask       = AT91_PMC_PCK2,
 185         .type           = CLK_TYPE_PROGRAMMABLE,
 186         .id             = 2,
 187 };
 188 static struct clk pck3 = {
 189         .name           = "pck3",
 190         .pmc_mask       = AT91_PMC_PCK3,
 191         .type           = CLK_TYPE_PROGRAMMABLE,
 192         .id             = 3,
 193 };
 194
 195 /* HClocks */
 196 static struct clk hck0 = {
 197         .name           = "hck0",
 198         .pmc_mask       = AT91_PMC_HCK0,
 199         .type           = CLK_TYPE_SYSTEM,
 200         .id             = 0,
 201 };
 202 static struct clk hck1 = {
 203         .name           = "hck1",
 204         .pmc_mask       = AT91_PMC_HCK1,
 205         .type           = CLK_TYPE_SYSTEM,
 206         .id             = 1,
 207 };
 208
 209 static void __init at91sam9261_register_clocks(void)
 210 {
 211         int i;
 212
 213         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 214                 clk_register(periph_clocks[i]);
 215
 216         clk_register(&pck0);
 217         clk_register(&pck1);
 218         clk_register(&pck2);
 219         clk_register(&pck3);
 220
 221         clk_register(&hck0);
 222         clk_register(&hck1);
 223 }
 224
 225 /* --------------------------------------------------------------------
 226  *  GPIO
 227  * -------------------------------------------------------------------- */
 228
 229 static struct at91_gpio_bank at91sam9261_gpio[] = {
 230         {
 231                 .id             = AT91SAM9261_ID_PIOA,
 232                 .offset         = AT91_PIOA,
 233                 .clock          = &pioA_clk,
 234         }, {
 235                 .id             = AT91SAM9261_ID_PIOB,
 236                 .offset         = AT91_PIOB,
 237                 .clock          = &pioB_clk,
 238         }, {
 239                 .id             = AT91SAM9261_ID_PIOC,
 240                 .offset         = AT91_PIOC,
 241                 .clock          = &pioC_clk,
 242         }
 243 };
 244
 245 static void at91sam9261_reset(void)
 246 {
 247         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 248 }
 249
 250 static void at91sam9261_poweroff(void)
 251 {
 252         at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 253 }
 254
 255
 256 /* --------------------------------------------------------------------
 257  *  AT91SAM9261 processor initialization
 258  * -------------------------------------------------------------------- */
 259
 260 void __init at91sam9261_initialize(unsigned long main_clock)
 261 {
 262         /* Map peripherals */
 263         iotable_init(at91sam9261_io_desc, ARRAY_SIZE(at91sam9261_io_desc));
 264
 265         at91_arch_reset = at91sam9261_reset;
 266         pm_power_off = at91sam9261_poweroff;
 267         at91_extern_irq = (1 << AT91SAM9261_ID_IRQ0) | (1 << AT91SAM9261_ID_IRQ1)
 268                         | (1 << AT91SAM9261_ID_IRQ2);
 269
 270         /* Init clock subsystem */
 271         at91_clock_init(main_clock);
 272
 273         /* Register the processor-specific clocks */
 274         at91sam9261_register_clocks();
 275
 276         /* Register GPIO subsystem */
 277         at91_gpio_init(at91sam9261_gpio, 3);
 278 }
 279
 280 /* --------------------------------------------------------------------
 281  *  Interrupt initialization
 282  * -------------------------------------------------------------------- */
 283
 284 /*
 285  * The default interrupt priority levels (0 = lowest, 7 = highest).
 286  */
 287 static unsigned int at91sam9261_default_irq_priority[NR_AIC_IRQS] __initdata = {
 288         7,      /* Advanced Interrupt Controller */
 289         7,      /* System Peripherals */
 290         1,      /* Parallel IO Controller A */
 291         1,      /* Parallel IO Controller B */
 292         1,      /* Parallel IO Controller C */
 293         0,
 294         5,      /* USART 0 */
 295         5,      /* USART 1 */
 296         5,      /* USART 2 */
 297         0,      /* Multimedia Card Interface */
 298         2,      /* USB Device Port */
 299         6,      /* Two-Wire Interface */
 300         5,      /* Serial Peripheral Interface 0 */
 301         5,      /* Serial Peripheral Interface 1 */
 302         4,      /* Serial Synchronous Controller 0 */
 303         4,      /* Serial Synchronous Controller 1 */
 304         4,      /* Serial Synchronous Controller 2 */
 305         0,      /* Timer Counter 0 */
 306         0,      /* Timer Counter 1 */
 307         0,      /* Timer Counter 2 */
 308         2,      /* USB Host port */
 309         3,      /* LCD Controller */
 310         0,
 311         0,
 312         0,
 313         0,
 314         0,
 315         0,
 316         0,
 317         0,      /* Advanced Interrupt Controller */
 318         0,      /* Advanced Interrupt Controller */
 319         0,      /* Advanced Interrupt Controller */
 320 };
 321
 322 void __init at91sam9261_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 323 {
 324         if (!priority)
 325                 priority = at91sam9261_default_irq_priority;
 326
 327         /* Initialize the AIC interrupt controller */
 328         at91_aic_init(priority);
 329
 330         /* Enable GPIO interrupts */
 331         at91_gpio_irq_setup();
 332 }