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at91sam9261.c

/*
 * arch/arm/mach-at91/at91sam9261.c
 *
 *  Copyright (C) 2005 SAN People
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/pm.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/arch/at91sam9261.h>
#include <asm/arch/at91_pmc.h>
#include <asm/arch/at91_rstc.h>
#include <asm/arch/at91_shdwc.h>

#include "generic.h"
#include "clock.h"

static struct map_desc at91sam9261_io_desc[] __initdata = {
      {
            .virtual    = AT91_VA_BASE_SYS,
            .pfn        = __phys_to_pfn(AT91_BASE_SYS),
            .length           = SZ_16K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = AT91_IO_VIRT_BASE - AT91SAM9261_SRAM_SIZE,
            .pfn        = __phys_to_pfn(AT91SAM9261_SRAM_BASE),
            .length           = AT91SAM9261_SRAM_SIZE,
            .type       = MT_DEVICE,
      },
};

/* --------------------------------------------------------------------
 *  Clocks
 * -------------------------------------------------------------------- */

/*
 * The peripheral clocks.
 */
static struct clk pioA_clk = {
      .name       = "pioA_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_PIOA,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk pioB_clk = {
      .name       = "pioB_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_PIOB,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk pioC_clk = {
      .name       = "pioC_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_PIOC,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk usart0_clk = {
      .name       = "usart0_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_US0,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk usart1_clk = {
      .name       = "usart1_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_US1,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk usart2_clk = {
      .name       = "usart2_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_US2,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk mmc_clk = {
      .name       = "mci_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_MCI,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk udc_clk = {
      .name       = "udc_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_UDP,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk twi_clk = {
      .name       = "twi_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_TWI,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk spi0_clk = {
      .name       = "spi0_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_SPI0,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk spi1_clk = {
      .name       = "spi1_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_SPI1,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk ssc0_clk = {
      .name       = "ssc0_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_SSC0,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk ssc1_clk = {
      .name       = "ssc1_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_SSC1,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk ssc2_clk = {
      .name       = "ssc2_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_SSC2,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk tc0_clk = {
      .name       = "tc0_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_TC0,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk tc1_clk = {
      .name       = "tc1_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_TC1,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk tc2_clk = {
      .name       = "tc2_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_TC2,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk ohci_clk = {
      .name       = "ohci_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_UHP,
      .type       = CLK_TYPE_PERIPHERAL,
};
static struct clk lcdc_clk = {
      .name       = "lcdc_clk",
      .pmc_mask   = 1 << AT91SAM9261_ID_LCDC,
      .type       = CLK_TYPE_PERIPHERAL,
};

static struct clk *periph_clocks[] __initdata = {
      &pioA_clk,
      &pioB_clk,
      &pioC_clk,
      &usart0_clk,
      &usart1_clk,
      &usart2_clk,
      &mmc_clk,
      &udc_clk,
      &twi_clk,
      &spi0_clk,
      &spi1_clk,
      &ssc0_clk,
      &ssc1_clk,
      &ssc2_clk,
      &tc0_clk,
      &tc1_clk,
      &tc2_clk,
      &ohci_clk,
      &lcdc_clk,
      // irq0 .. irq2
};

/*
 * The four programmable clocks.
 * You must configure pin multiplexing to bring these signals out.
 */
static struct clk pck0 = {
      .name       = "pck0",
      .pmc_mask   = AT91_PMC_PCK0,
      .type       = CLK_TYPE_PROGRAMMABLE,
      .id         = 0,
};
static struct clk pck1 = {
      .name       = "pck1",
      .pmc_mask   = AT91_PMC_PCK1,
      .type       = CLK_TYPE_PROGRAMMABLE,
      .id         = 1,
};
static struct clk pck2 = {
      .name       = "pck2",
      .pmc_mask   = AT91_PMC_PCK2,
      .type       = CLK_TYPE_PROGRAMMABLE,
      .id         = 2,
};
static struct clk pck3 = {
      .name       = "pck3",
      .pmc_mask   = AT91_PMC_PCK3,
      .type       = CLK_TYPE_PROGRAMMABLE,
      .id         = 3,
};

/* HClocks */
static struct clk hck0 = {
      .name       = "hck0",
      .pmc_mask   = AT91_PMC_HCK0,
      .type       = CLK_TYPE_SYSTEM,
      .id         = 0,
};
static struct clk hck1 = {
      .name       = "hck1",
      .pmc_mask   = AT91_PMC_HCK1,
      .type       = CLK_TYPE_SYSTEM,
      .id         = 1,
};

static void __init at91sam9261_register_clocks(void)
{
      int i;

      for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
            clk_register(periph_clocks[i]);

      clk_register(&pck0);
      clk_register(&pck1);
      clk_register(&pck2);
      clk_register(&pck3);

      clk_register(&hck0);
      clk_register(&hck1);
}

/* --------------------------------------------------------------------
 *  GPIO
 * -------------------------------------------------------------------- */

static struct at91_gpio_bank at91sam9261_gpio[] = {
      {
            .id         = AT91SAM9261_ID_PIOA,
            .offset           = AT91_PIOA,
            .clock            = &pioA_clk,
      }, {
            .id         = AT91SAM9261_ID_PIOB,
            .offset           = AT91_PIOB,
            .clock            = &pioB_clk,
      }, {
            .id         = AT91SAM9261_ID_PIOC,
            .offset           = AT91_PIOC,
            .clock            = &pioC_clk,
      }
};

static void at91sam9261_reset(void)
{
      at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
}

static void at91sam9261_poweroff(void)
{
      at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
}


/* --------------------------------------------------------------------
 *  AT91SAM9261 processor initialization
 * -------------------------------------------------------------------- */

void __init at91sam9261_initialize(unsigned long main_clock)
{
      /* Map peripherals */
      iotable_init(at91sam9261_io_desc, ARRAY_SIZE(at91sam9261_io_desc));

      at91_arch_reset = at91sam9261_reset;
      pm_power_off = at91sam9261_poweroff;
      at91_extern_irq = (1 << AT91SAM9261_ID_IRQ0) | (1 << AT91SAM9261_ID_IRQ1)
                  | (1 << AT91SAM9261_ID_IRQ2);

      /* Init clock subsystem */
      at91_clock_init(main_clock);

      /* Register the processor-specific clocks */
      at91sam9261_register_clocks();

      /* Register GPIO subsystem */
      at91_gpio_init(at91sam9261_gpio, 3);
}

/* --------------------------------------------------------------------
 *  Interrupt initialization
 * -------------------------------------------------------------------- */

/*
 * The default interrupt priority levels (0 = lowest, 7 = highest).
 */
static unsigned int at91sam9261_default_irq_priority[NR_AIC_IRQS] __initdata = {
      7,    /* Advanced Interrupt Controller */
      7,    /* System Peripherals */
      1,    /* Parallel IO Controller A */
      1,    /* Parallel IO Controller B */
      1,    /* Parallel IO Controller C */
      0,
      5,    /* USART 0 */
      5,    /* USART 1 */
      5,    /* USART 2 */
      0,    /* Multimedia Card Interface */
      2,    /* USB Device Port */
      6,    /* Two-Wire Interface */
      5,    /* Serial Peripheral Interface 0 */
      5,    /* Serial Peripheral Interface 1 */
      4,    /* Serial Synchronous Controller 0 */
      4,    /* Serial Synchronous Controller 1 */
      4,    /* Serial Synchronous Controller 2 */
      0,    /* Timer Counter 0 */
      0,    /* Timer Counter 1 */
      0,    /* Timer Counter 2 */
      2,    /* USB Host port */
      3,    /* LCD Controller */
      0,
      0,
      0,
      0,
      0,
      0,
      0,
      0,    /* Advanced Interrupt Controller */
      0,    /* Advanced Interrupt Controller */
      0,    /* Advanced Interrupt Controller */
};

void __init at91sam9261_init_interrupts(unsigned int priority[NR_AIC_IRQS])
{
      if (!priority)
            priority = at91sam9261_default_irq_priority;

      /* Initialize the AIC interrupt controller */
      at91_aic_init(priority);

      /* Enable GPIO interrupts */
      at91_gpio_irq_setup();
}

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