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/irq.h>
  17 #include <asm/mach/arch.h>
  18 #include <asm/mach/map.h>
  19 #include <mach/at91sam9261.h>
  20 #include <mach/at91_pmc.h>
  21 #include <mach/at91_rstc.h>
  22 #include <mach/at91_shdwc.h>
  23
  24 #include "generic.h"
  25 #include "clock.h"
  26
  27 static struct map_desc at91sam9261_io_desc[] __initdata = {
  28         {
  29                 .virtual        = AT91_VA_BASE_SYS,
  30                 .pfn            = __phys_to_pfn(AT91_BASE_SYS),
  31                 .length         = SZ_16K,
  32                 .type           = MT_DEVICE,
  33         }, {
  34                 .virtual        = AT91_IO_VIRT_BASE - AT91SAM9261_SRAM_SIZE,
  35                 .pfn            = __phys_to_pfn(AT91SAM9261_SRAM_BASE),
  36                 .length         = AT91SAM9261_SRAM_SIZE,
  37                 .type           = MT_DEVICE,
  38         },
  39 };
  40
  41 /* --------------------------------------------------------------------
  42  *  Clocks
  43  * -------------------------------------------------------------------- */
  44
  45 /*
  46  * The peripheral clocks.
  47  */
  48 static struct clk pioA_clk = {
  49         .name           = "pioA_clk",
  50         .pmc_mask       = 1 << AT91SAM9261_ID_PIOA,
  51         .type           = CLK_TYPE_PERIPHERAL,
  52 };
  53 static struct clk pioB_clk = {
  54         .name           = "pioB_clk",
  55         .pmc_mask       = 1 << AT91SAM9261_ID_PIOB,
  56         .type           = CLK_TYPE_PERIPHERAL,
  57 };
  58 static struct clk pioC_clk = {
  59         .name           = "pioC_clk",
  60         .pmc_mask       = 1 << AT91SAM9261_ID_PIOC,
  61         .type           = CLK_TYPE_PERIPHERAL,
  62 };
  63 static struct clk usart0_clk = {
  64         .name           = "usart0_clk",
  65         .pmc_mask       = 1 << AT91SAM9261_ID_US0,
  66         .type           = CLK_TYPE_PERIPHERAL,
  67 };
  68 static struct clk usart1_clk = {
  69         .name           = "usart1_clk",
  70         .pmc_mask       = 1 << AT91SAM9261_ID_US1,
  71         .type           = CLK_TYPE_PERIPHERAL,
  72 };
  73 static struct clk usart2_clk = {
  74         .name           = "usart2_clk",
  75         .pmc_mask       = 1 << AT91SAM9261_ID_US2,
  76         .type           = CLK_TYPE_PERIPHERAL,
  77 };
  78 static struct clk mmc_clk = {
  79         .name           = "mci_clk",
  80         .pmc_mask       = 1 << AT91SAM9261_ID_MCI,
  81         .type           = CLK_TYPE_PERIPHERAL,
  82 };
  83 static struct clk udc_clk = {
  84         .name           = "udc_clk",
  85         .pmc_mask       = 1 << AT91SAM9261_ID_UDP,
  86         .type           = CLK_TYPE_PERIPHERAL,
  87 };
  88 static struct clk twi_clk = {
  89         .name           = "twi_clk",
  90         .pmc_mask       = 1 << AT91SAM9261_ID_TWI,
  91         .type           = CLK_TYPE_PERIPHERAL,
  92 };
  93 static struct clk spi0_clk = {
  94         .name           = "spi0_clk",
  95         .pmc_mask       = 1 << AT91SAM9261_ID_SPI0,
  96         .type           = CLK_TYPE_PERIPHERAL,
  97 };
  98 static struct clk spi1_clk = {
  99         .name           = "spi1_clk",
 100         .pmc_mask       = 1 << AT91SAM9261_ID_SPI1,
 101         .type           = CLK_TYPE_PERIPHERAL,
 102 };
 103 static struct clk ssc0_clk = {
 104         .name           = "ssc0_clk",
 105         .pmc_mask       = 1 << AT91SAM9261_ID_SSC0,
 106         .type           = CLK_TYPE_PERIPHERAL,
 107 };
 108 static struct clk ssc1_clk = {
 109         .name           = "ssc1_clk",
 110         .pmc_mask       = 1 << AT91SAM9261_ID_SSC1,
 111         .type           = CLK_TYPE_PERIPHERAL,
 112 };
 113 static struct clk ssc2_clk = {
 114         .name           = "ssc2_clk",
 115         .pmc_mask       = 1 << AT91SAM9261_ID_SSC2,
 116         .type           = CLK_TYPE_PERIPHERAL,
 117 };
 118 static struct clk tc0_clk = {
 119         .name           = "tc0_clk",
 120         .pmc_mask       = 1 << AT91SAM9261_ID_TC0,
 121         .type           = CLK_TYPE_PERIPHERAL,
 122 };
 123 static struct clk tc1_clk = {
 124         .name           = "tc1_clk",
 125         .pmc_mask       = 1 << AT91SAM9261_ID_TC1,
 126         .type           = CLK_TYPE_PERIPHERAL,
 127 };
 128 static struct clk tc2_clk = {
 129         .name           = "tc2_clk",
 130         .pmc_mask       = 1 << AT91SAM9261_ID_TC2,
 131         .type           = CLK_TYPE_PERIPHERAL,
 132 };
 133 static struct clk ohci_clk = {
 134         .name           = "ohci_clk",
 135         .pmc_mask       = 1 << AT91SAM9261_ID_UHP,
 136         .type           = CLK_TYPE_PERIPHERAL,
 137 };
 138 static struct clk lcdc_clk = {
 139         .name           = "lcdc_clk",
 140         .pmc_mask       = 1 << AT91SAM9261_ID_LCDC,
 141         .type           = CLK_TYPE_PERIPHERAL,
 142 };
 143
 144 static struct clk *periph_clocks[] __initdata = {
 145         &pioA_clk,
 146         &pioB_clk,
 147         &pioC_clk,
 148         &usart0_clk,
 149         &usart1_clk,
 150         &usart2_clk,
 151         &mmc_clk,
 152         &udc_clk,
 153         &twi_clk,
 154         &spi0_clk,
 155         &spi1_clk,
 156         &ssc0_clk,
 157         &ssc1_clk,
 158         &ssc2_clk,
 159         &tc0_clk,
 160         &tc1_clk,
 161         &tc2_clk,
 162         &ohci_clk,
 163         &lcdc_clk,
 164         // irq0 .. irq2
 165 };
 166
 167 /*
 168  * The four programmable clocks.
 169  * You must configure pin multiplexing to bring these signals out.
 170  */
 171 static struct clk pck0 = {
 172         .name           = "pck0",
 173         .pmc_mask       = AT91_PMC_PCK0,
 174         .type           = CLK_TYPE_PROGRAMMABLE,
 175         .id             = 0,
 176 };
 177 static struct clk pck1 = {
 178         .name           = "pck1",
 179         .pmc_mask       = AT91_PMC_PCK1,
 180         .type           = CLK_TYPE_PROGRAMMABLE,
 181         .id             = 1,
 182 };
 183 static struct clk pck2 = {
 184         .name           = "pck2",
 185         .pmc_mask       = AT91_PMC_PCK2,
 186         .type           = CLK_TYPE_PROGRAMMABLE,
 187         .id             = 2,
 188 };
 189 static struct clk pck3 = {
 190         .name           = "pck3",
 191         .pmc_mask       = AT91_PMC_PCK3,
 192         .type           = CLK_TYPE_PROGRAMMABLE,
 193         .id             = 3,
 194 };
 195
 196 /* HClocks */
 197 static struct clk hck0 = {
 198         .name           = "hck0",
 199         .pmc_mask       = AT91_PMC_HCK0,
 200         .type           = CLK_TYPE_SYSTEM,
 201         .id             = 0,
 202 };
 203 static struct clk hck1 = {
 204         .name           = "hck1",
 205         .pmc_mask       = AT91_PMC_HCK1,
 206         .type           = CLK_TYPE_SYSTEM,
 207         .id             = 1,
 208 };
 209
 210 static void __init at91sam9261_register_clocks(void)
 211 {
 212         int i;
 213
 214         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 215                 clk_register(periph_clocks[i]);
 216
 217         clk_register(&pck0);
 218         clk_register(&pck1);
 219         clk_register(&pck2);
 220         clk_register(&pck3);
 221
 222         clk_register(&hck0);
 223         clk_register(&hck1);
 224 }
 225
 226 /* --------------------------------------------------------------------
 227  *  GPIO
 228  * -------------------------------------------------------------------- */
 229
 230 static struct at91_gpio_bank at91sam9261_gpio[] = {
 231         {
 232                 .id             = AT91SAM9261_ID_PIOA,
 233                 .offset         = AT91_PIOA,
 234                 .clock          = &pioA_clk,
 235         }, {
 236                 .id             = AT91SAM9261_ID_PIOB,
 237                 .offset         = AT91_PIOB,
 238                 .clock          = &pioB_clk,
 239         }, {
 240                 .id             = AT91SAM9261_ID_PIOC,
 241                 .offset         = AT91_PIOC,
 242                 .clock          = &pioC_clk,
 243         }
 244 };
 245
 246 static void at91sam9261_reset(void)
 247 {
 248         at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
 249 }
 250
 251 static void at91sam9261_poweroff(void)
 252 {
 253         at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 254 }
 255
 256
 257 /* --------------------------------------------------------------------
 258  *  AT91SAM9261 processor initialization
 259  * -------------------------------------------------------------------- */
 260
 261 void __init at91sam9261_initialize(unsigned long main_clock)
 262 {
 263         /* Map peripherals */
 264         iotable_init(at91sam9261_io_desc, ARRAY_SIZE(at91sam9261_io_desc));
 265
 266         at91_arch_reset = at91sam9261_reset;
 267         pm_power_off = at91sam9261_poweroff;
 268         at91_extern_irq = (1 << AT91SAM9261_ID_IRQ0) | (1 << AT91SAM9261_ID_IRQ1)
 269                         | (1 << AT91SAM9261_ID_IRQ2);
 270
 271         /* Init clock subsystem */
 272         at91_clock_init(main_clock);
 273
 274         /* Register the processor-specific clocks */
 275         at91sam9261_register_clocks();
 276
 277         /* Register GPIO subsystem */
 278         at91_gpio_init(at91sam9261_gpio, 3);
 279 }
 280
 281 /* --------------------------------------------------------------------
 282  *  Interrupt initialization
 283  * -------------------------------------------------------------------- */
 284
 285 /*
 286  * The default interrupt priority levels (0 = lowest, 7 = highest).
 287  */
 288 static unsigned int at91sam9261_default_irq_priority[NR_AIC_IRQS] __initdata = {
 289         7,      /* Advanced Interrupt Controller */
 290         7,      /* System Peripherals */
 291         1,      /* Parallel IO Controller A */
 292         1,      /* Parallel IO Controller B */
 293         1,      /* Parallel IO Controller C */
 294         0,
 295         5,      /* USART 0 */
 296         5,      /* USART 1 */
 297         5,      /* USART 2 */
 298         0,      /* Multimedia Card Interface */
 299         2,      /* USB Device Port */
 300         6,      /* Two-Wire Interface */
 301         5,      /* Serial Peripheral Interface 0 */
 302         5,      /* Serial Peripheral Interface 1 */
 303         4,      /* Serial Synchronous Controller 0 */
 304         4,      /* Serial Synchronous Controller 1 */
 305         4,      /* Serial Synchronous Controller 2 */
 306         0,      /* Timer Counter 0 */
 307         0,      /* Timer Counter 1 */
 308         0,      /* Timer Counter 2 */
 309         2,      /* USB Host port */
 310         3,      /* LCD Controller */
 311         0,
 312         0,
 313         0,
 314         0,
 315         0,
 316         0,
 317         0,
 318         0,      /* Advanced Interrupt Controller */
 319         0,      /* Advanced Interrupt Controller */
 320         0,      /* Advanced Interrupt Controller */
 321 };
 322
 323 void __init at91sam9261_init_interrupts(unsigned int priority[NR_AIC_IRQS])
 324 {
 325         if (!priority)
 326                 priority = at91sam9261_default_irq_priority;
 327
 328         /* Initialize the AIC interrupt controller */
 329         at91_aic_init(priority);
 330
 331         /* Enable GPIO interrupts */
 332         at91_gpio_irq_setup();
 333 }