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/cpu.h>
  20 #include <mach/at91sam9261.h>
  21 #include <mach/at91_pmc.h>
  22 #include <mach/at91_rstc.h>
  23 #include <mach/at91_shdwc.h>
  24
  25 #include "soc.h"
  26 #include "generic.h"
  27 #include "clock.h"
  28
  29 /* --------------------------------------------------------------------
  30  *  Clocks
  31  * -------------------------------------------------------------------- */
  32
  33 /*
  34  * The peripheral clocks.
  35  */
  36 static struct clk pioA_clk = {
  37         .name           = "pioA_clk",
  38         .pmc_mask       = 1 << AT91SAM9261_ID_PIOA,
  39         .type           = CLK_TYPE_PERIPHERAL,
  40 };
  41 static struct clk pioB_clk = {
  42         .name           = "pioB_clk",
  43         .pmc_mask       = 1 << AT91SAM9261_ID_PIOB,
  44         .type           = CLK_TYPE_PERIPHERAL,
  45 };
  46 static struct clk pioC_clk = {
  47         .name           = "pioC_clk",
  48         .pmc_mask       = 1 << AT91SAM9261_ID_PIOC,
  49         .type           = CLK_TYPE_PERIPHERAL,
  50 };
  51 static struct clk usart0_clk = {
  52         .name           = "usart0_clk",
  53         .pmc_mask       = 1 << AT91SAM9261_ID_US0,
  54         .type           = CLK_TYPE_PERIPHERAL,
  55 };
  56 static struct clk usart1_clk = {
  57         .name           = "usart1_clk",
  58         .pmc_mask       = 1 << AT91SAM9261_ID_US1,
  59         .type           = CLK_TYPE_PERIPHERAL,
  60 };
  61 static struct clk usart2_clk = {
  62         .name           = "usart2_clk",
  63         .pmc_mask       = 1 << AT91SAM9261_ID_US2,
  64         .type           = CLK_TYPE_PERIPHERAL,
  65 };
  66 static struct clk mmc_clk = {
  67         .name           = "mci_clk",
  68         .pmc_mask       = 1 << AT91SAM9261_ID_MCI,
  69         .type           = CLK_TYPE_PERIPHERAL,
  70 };
  71 static struct clk udc_clk = {
  72         .name           = "udc_clk",
  73         .pmc_mask       = 1 << AT91SAM9261_ID_UDP,
  74         .type           = CLK_TYPE_PERIPHERAL,
  75 };
  76 static struct clk twi_clk = {
  77         .name           = "twi_clk",
  78         .pmc_mask       = 1 << AT91SAM9261_ID_TWI,
  79         .type           = CLK_TYPE_PERIPHERAL,
  80 };
  81 static struct clk spi0_clk = {
  82         .name           = "spi0_clk",
  83         .pmc_mask       = 1 << AT91SAM9261_ID_SPI0,
  84         .type           = CLK_TYPE_PERIPHERAL,
  85 };
  86 static struct clk spi1_clk = {
  87         .name           = "spi1_clk",
  88         .pmc_mask       = 1 << AT91SAM9261_ID_SPI1,
  89         .type           = CLK_TYPE_PERIPHERAL,
  90 };
  91 static struct clk ssc0_clk = {
  92         .name           = "ssc0_clk",
  93         .pmc_mask       = 1 << AT91SAM9261_ID_SSC0,
  94         .type           = CLK_TYPE_PERIPHERAL,
  95 };
  96 static struct clk ssc1_clk = {
  97         .name           = "ssc1_clk",
  98         .pmc_mask       = 1 << AT91SAM9261_ID_SSC1,
  99         .type           = CLK_TYPE_PERIPHERAL,
 100 };
 101 static struct clk ssc2_clk = {
 102         .name           = "ssc2_clk",
 103         .pmc_mask       = 1 << AT91SAM9261_ID_SSC2,
 104         .type           = CLK_TYPE_PERIPHERAL,
 105 };
 106 static struct clk tc0_clk = {
 107         .name           = "tc0_clk",
 108         .pmc_mask       = 1 << AT91SAM9261_ID_TC0,
 109         .type           = CLK_TYPE_PERIPHERAL,
 110 };
 111 static struct clk tc1_clk = {
 112         .name           = "tc1_clk",
 113         .pmc_mask       = 1 << AT91SAM9261_ID_TC1,
 114         .type           = CLK_TYPE_PERIPHERAL,
 115 };
 116 static struct clk tc2_clk = {
 117         .name           = "tc2_clk",
 118         .pmc_mask       = 1 << AT91SAM9261_ID_TC2,
 119         .type           = CLK_TYPE_PERIPHERAL,
 120 };
 121 static struct clk ohci_clk = {
 122         .name           = "ohci_clk",
 123         .pmc_mask       = 1 << AT91SAM9261_ID_UHP,
 124         .type           = CLK_TYPE_PERIPHERAL,
 125 };
 126 static struct clk lcdc_clk = {
 127         .name           = "lcdc_clk",
 128         .pmc_mask       = 1 << AT91SAM9261_ID_LCDC,
 129         .type           = CLK_TYPE_PERIPHERAL,
 130 };
 131
 132 static struct clk *periph_clocks[] __initdata = {
 133         &pioA_clk,
 134         &pioB_clk,
 135         &pioC_clk,
 136         &usart0_clk,
 137         &usart1_clk,
 138         &usart2_clk,
 139         &mmc_clk,
 140         &udc_clk,
 141         &twi_clk,
 142         &spi0_clk,
 143         &spi1_clk,
 144         &ssc0_clk,
 145         &ssc1_clk,
 146         &ssc2_clk,
 147         &tc0_clk,
 148         &tc1_clk,
 149         &tc2_clk,
 150         &ohci_clk,
 151         &lcdc_clk,
 152         // irq0 .. irq2
 153 };
 154
 155 static struct clk_lookup periph_clocks_lookups[] = {
 156         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk),
 157         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.1", &spi1_clk),
 158         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
 159         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
 160         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc1_clk),
 161         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
 162         CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
 163         CLKDEV_CON_DEV_ID("pclk", "ssc.2", &ssc2_clk),
 164 };
 165
 166 static struct clk_lookup usart_clocks_lookups[] = {
 167         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 168         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 169         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 170         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 171 };
 172
 173 /*
 174  * The four programmable clocks.
 175  * You must configure pin multiplexing to bring these signals out.
 176  */
 177 static struct clk pck0 = {
 178         .name           = "pck0",
 179         .pmc_mask       = AT91_PMC_PCK0,
 180         .type           = CLK_TYPE_PROGRAMMABLE,
 181         .id             = 0,
 182 };
 183 static struct clk pck1 = {
 184         .name           = "pck1",
 185         .pmc_mask       = AT91_PMC_PCK1,
 186         .type           = CLK_TYPE_PROGRAMMABLE,
 187         .id             = 1,
 188 };
 189 static struct clk pck2 = {
 190         .name           = "pck2",
 191         .pmc_mask       = AT91_PMC_PCK2,
 192         .type           = CLK_TYPE_PROGRAMMABLE,
 193         .id             = 2,
 194 };
 195 static struct clk pck3 = {
 196         .name           = "pck3",
 197         .pmc_mask       = AT91_PMC_PCK3,
 198         .type           = CLK_TYPE_PROGRAMMABLE,
 199         .id             = 3,
 200 };
 201
 202 /* HClocks */
 203 static struct clk hck0 = {
 204         .name           = "hck0",
 205         .pmc_mask       = AT91_PMC_HCK0,
 206         .type           = CLK_TYPE_SYSTEM,
 207         .id             = 0,
 208 };
 209 static struct clk hck1 = {
 210         .name           = "hck1",
 211         .pmc_mask       = AT91_PMC_HCK1,
 212         .type           = CLK_TYPE_SYSTEM,
 213         .id             = 1,
 214 };
 215
 216 static void __init at91sam9261_register_clocks(void)
 217 {
 218         int i;
 219
 220         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 221                 clk_register(periph_clocks[i]);
 222
 223         clkdev_add_table(periph_clocks_lookups,
 224                          ARRAY_SIZE(periph_clocks_lookups));
 225         clkdev_add_table(usart_clocks_lookups,
 226                          ARRAY_SIZE(usart_clocks_lookups));
 227
 228         clk_register(&pck0);
 229         clk_register(&pck1);
 230         clk_register(&pck2);
 231         clk_register(&pck3);
 232
 233         clk_register(&hck0);
 234         clk_register(&hck1);
 235 }
 236
 237 static struct clk_lookup console_clock_lookup;
 238
 239 void __init at91sam9261_set_console_clock(int id)
 240 {
 241         if (id >= ARRAY_SIZE(usart_clocks_lookups))
 242                 return;
 243
 244         console_clock_lookup.con_id = "usart";
 245         console_clock_lookup.clk = usart_clocks_lookups[id].clk;
 246         clkdev_add(&console_clock_lookup);
 247 }
 248
 249 /* --------------------------------------------------------------------
 250  *  GPIO
 251  * -------------------------------------------------------------------- */
 252
 253 static struct at91_gpio_bank at91sam9261_gpio[] = {
 254         {
 255                 .id             = AT91SAM9261_ID_PIOA,
 256                 .offset         = AT91_PIOA,
 257                 .clock          = &pioA_clk,
 258         }, {
 259                 .id             = AT91SAM9261_ID_PIOB,
 260                 .offset         = AT91_PIOB,
 261                 .clock          = &pioB_clk,
 262         }, {
 263                 .id             = AT91SAM9261_ID_PIOC,
 264                 .offset         = AT91_PIOC,
 265                 .clock          = &pioC_clk,
 266         }
 267 };
 268
 269 static void at91sam9261_poweroff(void)
 270 {
 271         at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
 272 }
 273
 274
 275 /* --------------------------------------------------------------------
 276  *  AT91SAM9261 processor initialization
 277  * -------------------------------------------------------------------- */
 278
 279 static void __init at91sam9261_map_io(void)
 280 {
 281         if (cpu_is_at91sam9g10())
 282                 at91_init_sram(0, AT91SAM9G10_SRAM_BASE, AT91SAM9G10_SRAM_SIZE);
 283         else
 284                 at91_init_sram(0, AT91SAM9261_SRAM_BASE, AT91SAM9261_SRAM_SIZE);
 285 }
 286
 287 static void __init at91sam9261_initialize(void)
 288 {
 289         at91_arch_reset = at91sam9_alt_reset;
 290         pm_power_off = at91sam9261_poweroff;
 291         at91_extern_irq = (1 << AT91SAM9261_ID_IRQ0) | (1 << AT91SAM9261_ID_IRQ1)
 292                         | (1 << AT91SAM9261_ID_IRQ2);
 293
 294         /* Register GPIO subsystem */
 295         at91_gpio_init(at91sam9261_gpio, 3);
 296 }
 297
 298 /* --------------------------------------------------------------------
 299  *  Interrupt initialization
 300  * -------------------------------------------------------------------- */
 301
 302 /*
 303  * The default interrupt priority levels (0 = lowest, 7 = highest).
 304  */
 305 static unsigned int at91sam9261_default_irq_priority[NR_AIC_IRQS] __initdata = {
 306         7,      /* Advanced Interrupt Controller */
 307         7,      /* System Peripherals */
 308         1,      /* Parallel IO Controller A */
 309         1,      /* Parallel IO Controller B */
 310         1,      /* Parallel IO Controller C */
 311         0,
 312         5,      /* USART 0 */
 313         5,      /* USART 1 */
 314         5,      /* USART 2 */
 315         0,      /* Multimedia Card Interface */
 316         2,      /* USB Device Port */
 317         6,      /* Two-Wire Interface */
 318         5,      /* Serial Peripheral Interface 0 */
 319         5,      /* Serial Peripheral Interface 1 */
 320         4,      /* Serial Synchronous Controller 0 */
 321         4,      /* Serial Synchronous Controller 1 */
 322         4,      /* Serial Synchronous Controller 2 */
 323         0,      /* Timer Counter 0 */
 324         0,      /* Timer Counter 1 */
 325         0,      /* Timer Counter 2 */
 326         2,      /* USB Host port */
 327         3,      /* LCD Controller */
 328         0,
 329         0,
 330         0,
 331         0,
 332         0,
 333         0,
 334         0,
 335         0,      /* Advanced Interrupt Controller */
 336         0,      /* Advanced Interrupt Controller */
 337         0,      /* Advanced Interrupt Controller */
 338 };
 339
 340 struct at91_init_soc __initdata at91sam9261_soc = {
 341         .map_io = at91sam9261_map_io,
 342         .default_irq_priority = at91sam9261_default_irq_priority,
 343         .register_clocks = at91sam9261_register_clocks,
 344         .init = at91sam9261_initialize,
 345 };