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
  15 #include <asm/irq.h>
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18 #include <mach/cpu.h>
  19 #include <mach/at91sam9261.h>
  20 #include <mach/at91_pmc.h>
  21 #include <mach/at91_rstc.h>
  22
  23 #include "soc.h"
  24 #include "generic.h"
  25 #include "clock.h"
  26 #include "sam9_smc.h"
  27
  28 /* --------------------------------------------------------------------
  29  *  Clocks
  30  * -------------------------------------------------------------------- */
  31
  32 /*
  33  * The peripheral clocks.
  34  */
  35 static struct clk pioA_clk = {
  36         .name           = "pioA_clk",
  37         .pmc_mask       = 1 << AT91SAM9261_ID_PIOA,
  38         .type           = CLK_TYPE_PERIPHERAL,
  39 };
  40 static struct clk pioB_clk = {
  41         .name           = "pioB_clk",
  42         .pmc_mask       = 1 << AT91SAM9261_ID_PIOB,
  43         .type           = CLK_TYPE_PERIPHERAL,
  44 };
  45 static struct clk pioC_clk = {
  46         .name           = "pioC_clk",
  47         .pmc_mask       = 1 << AT91SAM9261_ID_PIOC,
  48         .type           = CLK_TYPE_PERIPHERAL,
  49 };
  50 static struct clk usart0_clk = {
  51         .name           = "usart0_clk",
  52         .pmc_mask       = 1 << AT91SAM9261_ID_US0,
  53         .type           = CLK_TYPE_PERIPHERAL,
  54 };
  55 static struct clk usart1_clk = {
  56         .name           = "usart1_clk",
  57         .pmc_mask       = 1 << AT91SAM9261_ID_US1,
  58         .type           = CLK_TYPE_PERIPHERAL,
  59 };
  60 static struct clk usart2_clk = {
  61         .name           = "usart2_clk",
  62         .pmc_mask       = 1 << AT91SAM9261_ID_US2,
  63         .type           = CLK_TYPE_PERIPHERAL,
  64 };
  65 static struct clk mmc_clk = {
  66         .name           = "mci_clk",
  67         .pmc_mask       = 1 << AT91SAM9261_ID_MCI,
  68         .type           = CLK_TYPE_PERIPHERAL,
  69 };
  70 static struct clk udc_clk = {
  71         .name           = "udc_clk",
  72         .pmc_mask       = 1 << AT91SAM9261_ID_UDP,
  73         .type           = CLK_TYPE_PERIPHERAL,
  74 };
  75 static struct clk twi_clk = {
  76         .name           = "twi_clk",
  77         .pmc_mask       = 1 << AT91SAM9261_ID_TWI,
  78         .type           = CLK_TYPE_PERIPHERAL,
  79 };
  80 static struct clk spi0_clk = {
  81         .name           = "spi0_clk",
  82         .pmc_mask       = 1 << AT91SAM9261_ID_SPI0,
  83         .type           = CLK_TYPE_PERIPHERAL,
  84 };
  85 static struct clk spi1_clk = {
  86         .name           = "spi1_clk",
  87         .pmc_mask       = 1 << AT91SAM9261_ID_SPI1,
  88         .type           = CLK_TYPE_PERIPHERAL,
  89 };
  90 static struct clk ssc0_clk = {
  91         .name           = "ssc0_clk",
  92         .pmc_mask       = 1 << AT91SAM9261_ID_SSC0,
  93         .type           = CLK_TYPE_PERIPHERAL,
  94 };
  95 static struct clk ssc1_clk = {
  96         .name           = "ssc1_clk",
  97         .pmc_mask       = 1 << AT91SAM9261_ID_SSC1,
  98         .type           = CLK_TYPE_PERIPHERAL,
  99 };
 100 static struct clk ssc2_clk = {
 101         .name           = "ssc2_clk",
 102         .pmc_mask       = 1 << AT91SAM9261_ID_SSC2,
 103         .type           = CLK_TYPE_PERIPHERAL,
 104 };
 105 static struct clk tc0_clk = {
 106         .name           = "tc0_clk",
 107         .pmc_mask       = 1 << AT91SAM9261_ID_TC0,
 108         .type           = CLK_TYPE_PERIPHERAL,
 109 };
 110 static struct clk tc1_clk = {
 111         .name           = "tc1_clk",
 112         .pmc_mask       = 1 << AT91SAM9261_ID_TC1,
 113         .type           = CLK_TYPE_PERIPHERAL,
 114 };
 115 static struct clk tc2_clk = {
 116         .name           = "tc2_clk",
 117         .pmc_mask       = 1 << AT91SAM9261_ID_TC2,
 118         .type           = CLK_TYPE_PERIPHERAL,
 119 };
 120 static struct clk ohci_clk = {
 121         .name           = "ohci_clk",
 122         .pmc_mask       = 1 << AT91SAM9261_ID_UHP,
 123         .type           = CLK_TYPE_PERIPHERAL,
 124 };
 125 static struct clk lcdc_clk = {
 126         .name           = "lcdc_clk",
 127         .pmc_mask       = 1 << AT91SAM9261_ID_LCDC,
 128         .type           = CLK_TYPE_PERIPHERAL,
 129 };
 130
 131 /* HClocks */
 132 static struct clk hck0 = {
 133         .name           = "hck0",
 134         .pmc_mask       = AT91_PMC_HCK0,
 135         .type           = CLK_TYPE_SYSTEM,
 136         .id             = 0,
 137 };
 138 static struct clk hck1 = {
 139         .name           = "hck1",
 140         .pmc_mask       = AT91_PMC_HCK1,
 141         .type           = CLK_TYPE_SYSTEM,
 142         .id             = 1,
 143 };
 144
 145 static struct clk *periph_clocks[] __initdata = {
 146         &pioA_clk,
 147         &pioB_clk,
 148         &pioC_clk,
 149         &usart0_clk,
 150         &usart1_clk,
 151         &usart2_clk,
 152         &mmc_clk,
 153         &udc_clk,
 154         &twi_clk,
 155         &spi0_clk,
 156         &spi1_clk,
 157         &ssc0_clk,
 158         &ssc1_clk,
 159         &ssc2_clk,
 160         &tc0_clk,
 161         &tc1_clk,
 162         &tc2_clk,
 163         &ohci_clk,
 164         &lcdc_clk,
 165         // irq0 .. irq2
 166 };
 167
 168 static struct clk_lookup periph_clocks_lookups[] = {
 169         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.0", &spi0_clk),
 170         CLKDEV_CON_DEV_ID("spi_clk", "atmel_spi.1", &spi1_clk),
 171         CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
 172         CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
 173         CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
 174         CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
 175         CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
 176         CLKDEV_CON_DEV_ID("pclk", "ssc.2", &ssc2_clk),
 177         CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &hck0),
 178         CLKDEV_CON_ID("pioA", &pioA_clk),
 179         CLKDEV_CON_ID("pioB", &pioB_clk),
 180         CLKDEV_CON_ID("pioC", &pioC_clk),
 181 };
 182
 183 static struct clk_lookup usart_clocks_lookups[] = {
 184         CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
 185         CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
 186         CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
 187         CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
 188 };
 189
 190 /*
 191  * The four programmable clocks.
 192  * You must configure pin multiplexing to bring these signals out.
 193  */
 194 static struct clk pck0 = {
 195         .name           = "pck0",
 196         .pmc_mask       = AT91_PMC_PCK0,
 197         .type           = CLK_TYPE_PROGRAMMABLE,
 198         .id             = 0,
 199 };
 200 static struct clk pck1 = {
 201         .name           = "pck1",
 202         .pmc_mask       = AT91_PMC_PCK1,
 203         .type           = CLK_TYPE_PROGRAMMABLE,
 204         .id             = 1,
 205 };
 206 static struct clk pck2 = {
 207         .name           = "pck2",
 208         .pmc_mask       = AT91_PMC_PCK2,
 209         .type           = CLK_TYPE_PROGRAMMABLE,
 210         .id             = 2,
 211 };
 212 static struct clk pck3 = {
 213         .name           = "pck3",
 214         .pmc_mask       = AT91_PMC_PCK3,
 215         .type           = CLK_TYPE_PROGRAMMABLE,
 216         .id             = 3,
 217 };
 218
 219 static void __init at91sam9261_register_clocks(void)
 220 {
 221         int i;
 222
 223         for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
 224                 clk_register(periph_clocks[i]);
 225
 226         clkdev_add_table(periph_clocks_lookups,
 227                          ARRAY_SIZE(periph_clocks_lookups));
 228         clkdev_add_table(usart_clocks_lookups,
 229                          ARRAY_SIZE(usart_clocks_lookups));
 230
 231         clk_register(&pck0);
 232         clk_register(&pck1);
 233         clk_register(&pck2);
 234         clk_register(&pck3);
 235
 236         clk_register(&hck0);
 237         clk_register(&hck1);
 238 }
 239
 240 static struct clk_lookup console_clock_lookup;
 241
 242 void __init at91sam9261_set_console_clock(int id)
 243 {
 244         if (id >= ARRAY_SIZE(usart_clocks_lookups))
 245                 return;
 246
 247         console_clock_lookup.con_id = "usart";
 248         console_clock_lookup.clk = usart_clocks_lookups[id].clk;
 249         clkdev_add(&console_clock_lookup);
 250 }
 251
 252 /* --------------------------------------------------------------------
 253  *  GPIO
 254  * -------------------------------------------------------------------- */
 255
 256 static struct at91_gpio_bank at91sam9261_gpio[] __initdata = {
 257         {
 258                 .id             = AT91SAM9261_ID_PIOA,
 259                 .regbase        = AT91SAM9261_BASE_PIOA,
 260         }, {
 261                 .id             = AT91SAM9261_ID_PIOB,
 262                 .regbase        = AT91SAM9261_BASE_PIOB,
 263         }, {
 264                 .id             = AT91SAM9261_ID_PIOC,
 265                 .regbase        = AT91SAM9261_BASE_PIOC,
 266         }
 267 };
 268
 269 /* --------------------------------------------------------------------
 270  *  AT91SAM9261 processor initialization
 271  * -------------------------------------------------------------------- */
 272
 273 static void __init at91sam9261_map_io(void)
 274 {
 275         if (cpu_is_at91sam9g10())
 276                 at91_init_sram(0, AT91SAM9G10_SRAM_BASE, AT91SAM9G10_SRAM_SIZE);
 277         else
 278                 at91_init_sram(0, AT91SAM9261_SRAM_BASE, AT91SAM9261_SRAM_SIZE);
 279 }
 280
 281 static void __init at91sam9261_ioremap_registers(void)
 282 {
 283         at91_ioremap_shdwc(AT91SAM9261_BASE_SHDWC);
 284         at91_ioremap_rstc(AT91SAM9261_BASE_RSTC);
 285         at91sam926x_ioremap_pit(AT91SAM9261_BASE_PIT);
 286         at91sam9_ioremap_smc(0, AT91SAM9261_BASE_SMC);
 287 }
 288
 289 static void __init at91sam9261_initialize(void)
 290 {
 291         arm_pm_restart = at91sam9_alt_restart;
 292         at91_extern_irq = (1 << AT91SAM9261_ID_IRQ0) | (1 << AT91SAM9261_ID_IRQ1)
 293                         | (1 << AT91SAM9261_ID_IRQ2);
 294
 295         /* Register GPIO subsystem */
 296         at91_gpio_init(at91sam9261_gpio, 3);
 297 }
 298
 299 /* --------------------------------------------------------------------
 300  *  Interrupt initialization
 301  * -------------------------------------------------------------------- */
 302
 303 /*
 304  * The default interrupt priority levels (0 = lowest, 7 = highest).
 305  */
 306 static unsigned int at91sam9261_default_irq_priority[NR_AIC_IRQS] __initdata = {
 307         7,      /* Advanced Interrupt Controller */
 308         7,      /* System Peripherals */
 309         1,      /* Parallel IO Controller A */
 310         1,      /* Parallel IO Controller B */
 311         1,      /* Parallel IO Controller C */
 312         0,
 313         5,      /* USART 0 */
 314         5,      /* USART 1 */
 315         5,      /* USART 2 */
 316         0,      /* Multimedia Card Interface */
 317         2,      /* USB Device Port */
 318         6,      /* Two-Wire Interface */
 319         5,      /* Serial Peripheral Interface 0 */
 320         5,      /* Serial Peripheral Interface 1 */
 321         4,      /* Serial Synchronous Controller 0 */
 322         4,      /* Serial Synchronous Controller 1 */
 323         4,      /* Serial Synchronous Controller 2 */
 324         0,      /* Timer Counter 0 */
 325         0,      /* Timer Counter 1 */
 326         0,      /* Timer Counter 2 */
 327         2,      /* USB Host port */
 328         3,      /* LCD Controller */
 329         0,
 330         0,
 331         0,
 332         0,
 333         0,
 334         0,
 335         0,
 336         0,      /* Advanced Interrupt Controller */
 337         0,      /* Advanced Interrupt Controller */
 338         0,      /* Advanced Interrupt Controller */
 339 };
 340
 341 struct at91_init_soc __initdata at91sam9261_soc = {
 342         .map_io = at91sam9261_map_io,
 343         .default_irq_priority = at91sam9261_default_irq_priority,
 344         .ioremap_registers = at91sam9261_ioremap_registers,
 345         .register_clocks = at91sam9261_register_clocks,
 346         .init = at91sam9261_initialize,
 347 };