/*
 * arch/arm/mach-at91/at91cap9.c
 *
 *  Copyright (C) 2007 Stelian Pop <stelian.pop@leadtechdesign.com>
 *  Copyright (C) 2007 Lead Tech Design <www.leadtechdesign.com>
 *  Copyright (C) 2007 Atmel Corporation.
 *
 * 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/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include <mach/cpu.h>
#include <mach/at91cap9.h>
#include <mach/at91_pmc.h>
#include <mach/at91_rstc.h>
#include <mach/at91_shdwc.h>

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

static struct map_desc at91cap9_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 - AT91CAP9_SRAM_SIZE,
                .pfn            = __phys_to_pfn(AT91CAP9_SRAM_BASE),
                .length         = AT91CAP9_SRAM_SIZE,
                .type           = MT_DEVICE,
        },
};

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

/*
 * The peripheral clocks.
 */
static struct clk pioABCD_clk = {
        .name           = "pioABCD_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_PIOABCD,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk mpb0_clk = {
        .name           = "mpb0_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_MPB0,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk mpb1_clk = {
        .name           = "mpb1_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_MPB1,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk mpb2_clk = {
        .name           = "mpb2_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_MPB2,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk mpb3_clk = {
        .name           = "mpb3_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_MPB3,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk mpb4_clk = {
        .name           = "mpb4_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_MPB4,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk usart0_clk = {
        .name           = "usart0_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_US0,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk usart1_clk = {
        .name           = "usart1_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_US1,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk usart2_clk = {
        .name           = "usart2_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_US2,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk mmc0_clk = {
        .name           = "mci0_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_MCI0,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk mmc1_clk = {
        .name           = "mci1_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_MCI1,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk can_clk = {
        .name           = "can_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_CAN,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk twi_clk = {
        .name           = "twi_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_TWI,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk spi0_clk = {
        .name           = "spi0_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_SPI0,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk spi1_clk = {
        .name           = "spi1_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_SPI1,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk ssc0_clk = {
        .name           = "ssc0_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_SSC0,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk ssc1_clk = {
        .name           = "ssc1_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_SSC1,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk ac97_clk = {
        .name           = "ac97_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_AC97C,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk tcb_clk = {
        .name           = "tcb_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_TCB,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk pwm_clk = {
        .name           = "pwm_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_PWMC,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk macb_clk = {
        .name           = "macb_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_EMAC,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk aestdes_clk = {
        .name           = "aestdes_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_AESTDES,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk adc_clk = {
        .name           = "adc_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_ADC,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk isi_clk = {
        .name           = "isi_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_ISI,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk lcdc_clk = {
        .name           = "lcdc_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_LCDC,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk dma_clk = {
        .name           = "dma_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_DMA,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk udphs_clk = {
        .name           = "udphs_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_UDPHS,
        .type           = CLK_TYPE_PERIPHERAL,
};
static struct clk ohci_clk = {
        .name           = "ohci_clk",
        .pmc_mask       = 1 << AT91CAP9_ID_UHP,
        .type           = CLK_TYPE_PERIPHERAL,
};

static struct clk *periph_clocks[] __initdata = {
        &pioABCD_clk,
        &mpb0_clk,
        &mpb1_clk,
        &mpb2_clk,
        &mpb3_clk,
        &mpb4_clk,
        &usart0_clk,
        &usart1_clk,
        &usart2_clk,
        &mmc0_clk,
        &mmc1_clk,
        &can_clk,
        &twi_clk,
        &spi0_clk,
        &spi1_clk,
        &ssc0_clk,
        &ssc1_clk,
        &ac97_clk,
        &tcb_clk,
        &pwm_clk,
        &macb_clk,
        &aestdes_clk,
        &adc_clk,
        &isi_clk,
        &lcdc_clk,
        &dma_clk,
        &udphs_clk,
        &ohci_clk,
        // irq0 .. irq1
};

/*
 * 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,
};

static void __init at91cap9_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);
}

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

static struct at91_gpio_bank at91cap9_gpio[] = {
        {
                .id             = AT91CAP9_ID_PIOABCD,
                .offset         = AT91_PIOA,
                .clock          = &pioABCD_clk,
        }, {
                .id             = AT91CAP9_ID_PIOABCD,
                .offset         = AT91_PIOB,
                .clock          = &pioABCD_clk,
        }, {
                .id             = AT91CAP9_ID_PIOABCD,
                .offset         = AT91_PIOC,
                .clock          = &pioABCD_clk,
        }, {
                .id             = AT91CAP9_ID_PIOABCD,
                .offset         = AT91_PIOD,
                .clock          = &pioABCD_clk,
        }
};

static void at91cap9_reset(void)
{
        at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
}

static void at91cap9_poweroff(void)
{
        at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
}


/* --------------------------------------------------------------------
 *  AT91CAP9 processor initialization
 * -------------------------------------------------------------------- */

void __init at91cap9_initialize(unsigned long main_clock)
{
        /* Map peripherals */
        iotable_init(at91cap9_io_desc, ARRAY_SIZE(at91cap9_io_desc));

        at91_arch_reset = at91cap9_reset;
        pm_power_off = at91cap9_poweroff;
        at91_extern_irq = (1 << AT91CAP9_ID_IRQ0) | (1 << AT91CAP9_ID_IRQ1);

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

        /* Register the processor-specific clocks */
        at91cap9_register_clocks();

        /* Register GPIO subsystem */
        at91_gpio_init(at91cap9_gpio, 4);

        /* Remember the silicon revision */
        if (cpu_is_at91cap9_revB())
                system_rev = 0xB;
        else if (cpu_is_at91cap9_revC())
                system_rev = 0xC;
}

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

/*
 * The default interrupt priority levels (0 = lowest, 7 = highest).
 */
static unsigned int at91cap9_default_irq_priority[NR_AIC_IRQS] __initdata = {
        7,      /* Advanced Interrupt Controller (FIQ) */
        7,      /* System Peripherals */
        1,      /* Parallel IO Controller A, B, C and D */
        0,      /* MP Block Peripheral 0 */
        0,      /* MP Block Peripheral 1 */
        0,      /* MP Block Peripheral 2 */
        0,      /* MP Block Peripheral 3 */
        0,      /* MP Block Peripheral 4 */
        5,      /* USART 0 */
        5,      /* USART 1 */
        5,      /* USART 2 */
        0,      /* Multimedia Card Interface 0 */
        0,      /* Multimedia Card Interface 1 */
        3,      /* CAN */
        6,      /* Two-Wire Interface */
        5,      /* Serial Peripheral Interface 0 */
        5,      /* Serial Peripheral Interface 1 */
        4,      /* Serial Synchronous Controller 0 */
        4,      /* Serial Synchronous Controller 1 */
        5,      /* AC97 Controller */
        0,      /* Timer Counter 0, 1 and 2 */
        0,      /* Pulse Width Modulation Controller */
        3,      /* Ethernet */
        0,      /* Advanced Encryption Standard, Triple DES*/
        0,      /* Analog-to-Digital Converter */
        0,      /* Image Sensor Interface */
        3,      /* LCD Controller */
        0,      /* DMA Controller */
        2,      /* USB Device Port */
        2,      /* USB Host port */
        0,      /* Advanced Interrupt Controller (IRQ0) */
        0,      /* Advanced Interrupt Controller (IRQ1) */
};

void __init at91cap9_init_interrupts(unsigned int priority[NR_AIC_IRQS])
{
        if (!priority)
                priority = at91cap9_default_irq_priority;

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

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