devices.c

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/*
 * mach-davinci/devices.c
 *
 * DaVinci platform device setup/initialization
 *
 * 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/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>

#include <mach/hardware.h>
#include <linux/platform_data/i2c-davinci.h>
#include <mach/irqs.h>
#include <mach/cputype.h>
#include <mach/mux.h>
#include <mach/edma.h>
#include <linux/platform_data/mmc-davinci.h>
#include <mach/time.h>

#include "davinci.h"
#include "clock.h"

#define DAVINCI_I2C_BASE         0x01C21000
#define DAVINCI_ATA_BASE         0x01C66000
#define DAVINCI_MMCSD0_BASE      0x01E10000
#define DM355_MMCSD0_BASE        0x01E11000
#define DM355_MMCSD1_BASE        0x01E00000
#define DM365_MMCSD0_BASE        0x01D11000
#define DM365_MMCSD1_BASE        0x01D00000

void __iomem  *davinci_sysmod_base;

void davinci_map_sysmod(void)
{
    davinci_sysmod_base = ioremap_nocache(DAVINCI_SYSTEM_MODULE_BASE,
                          0x800);
    /*
     * Throw a bug since a lot of board initialization code depends
     * on system module availability. ioremap() failing this early
     * need careful looking into anyway.
     */
    BUG_ON(!davinci_sysmod_base);
}

static struct resource i2c_resources[] = {
    {
        .start      = DAVINCI_I2C_BASE,
        .end        = DAVINCI_I2C_BASE + 0x40,
        .flags      = IORESOURCE_MEM,
    },
    {
        .start      = IRQ_I2C,
        .flags      = IORESOURCE_IRQ,
    },
};

static struct platform_device davinci_i2c_device = {
    .name           = "i2c_davinci",
    .id             = 1,
    .num_resources  = ARRAY_SIZE(i2c_resources),
    .resource   = i2c_resources,
};

void __init davinci_init_i2c(struct davinci_i2c_platform_data *pdata)
{
    if (cpu_is_davinci_dm644x())
        davinci_cfg_reg(DM644X_I2C);

    davinci_i2c_device.dev.platform_data = pdata;
    (void) platform_device_register(&davinci_i2c_device);
}

static struct resource ide_resources[] = {
    {
        .start      = DAVINCI_ATA_BASE,
        .end        = DAVINCI_ATA_BASE + 0x7ff,
        .flags      = IORESOURCE_MEM,
    },
    {
        .start      = IRQ_IDE,
        .end        = IRQ_IDE,
        .flags      = IORESOURCE_IRQ,
    },
};

static u64 ide_dma_mask = DMA_BIT_MASK(32);

static struct platform_device ide_device = {
    .name           = "palm_bk3710",
    .id             = -1,
    .resource       = ide_resources,
    .num_resources  = ARRAY_SIZE(ide_resources),
    .dev = {
        .dma_mask       = &ide_dma_mask,
        .coherent_dma_mask      = DMA_BIT_MASK(32),
    },
};

void __init davinci_init_ide(void)
{
    if (cpu_is_davinci_dm644x()) {
        davinci_cfg_reg(DM644X_HPIEN_DISABLE);
        davinci_cfg_reg(DM644X_ATAEN);
        davinci_cfg_reg(DM644X_HDIREN);
    } else if (cpu_is_davinci_dm646x()) {
        /* IRQ_DM646X_IDE is the same as IRQ_IDE */
        davinci_cfg_reg(DM646X_ATAEN);
    } else {
        WARN_ON(1);
        return;
    }

    platform_device_register(&ide_device);
}

#if defined(CONFIG_MMC_DAVINCI) || defined(CONFIG_MMC_DAVINCI_MODULE)

static u64 mmcsd0_dma_mask = DMA_BIT_MASK(32);

static struct resource mmcsd0_resources[] = {
    {
        /* different on dm355 */
        .start = DAVINCI_MMCSD0_BASE,
        .end   = DAVINCI_MMCSD0_BASE + SZ_4K - 1,
        .flags = IORESOURCE_MEM,
    },
    /* IRQs:  MMC/SD, then SDIO */
    {
        .start = IRQ_MMCINT,
        .flags = IORESOURCE_IRQ,
    }, {
        /* different on dm355 */
        .start = IRQ_SDIOINT,
        .flags = IORESOURCE_IRQ,
    },
    /* DMA channels: RX, then TX */
    {
        .start = EDMA_CTLR_CHAN(0, DAVINCI_DMA_MMCRXEVT),
        .flags = IORESOURCE_DMA,
    }, {
        .start = EDMA_CTLR_CHAN(0, DAVINCI_DMA_MMCTXEVT),
        .flags = IORESOURCE_DMA,
    },
};

static struct platform_device davinci_mmcsd0_device = {
    .name = "davinci_mmc",
    .id = 0,
    .dev = {
        .dma_mask = &mmcsd0_dma_mask,
        .coherent_dma_mask = DMA_BIT_MASK(32),
    },
    .num_resources = ARRAY_SIZE(mmcsd0_resources),
    .resource = mmcsd0_resources,
};

static u64 mmcsd1_dma_mask = DMA_BIT_MASK(32);

static struct resource mmcsd1_resources[] = {
    {
        .start = DM355_MMCSD1_BASE,
        .end   = DM355_MMCSD1_BASE + SZ_4K - 1,
        .flags = IORESOURCE_MEM,
    },
    /* IRQs:  MMC/SD, then SDIO */
    {
        .start = IRQ_DM355_MMCINT1,
        .flags = IORESOURCE_IRQ,
    }, {
        .start = IRQ_DM355_SDIOINT1,
        .flags = IORESOURCE_IRQ,
    },
    /* DMA channels: RX, then TX */
    {
        .start = EDMA_CTLR_CHAN(0, 30), /* rx */
        .flags = IORESOURCE_DMA,
    }, {
        .start = EDMA_CTLR_CHAN(0, 31), /* tx */
        .flags = IORESOURCE_DMA,
    },
};

static struct platform_device davinci_mmcsd1_device = {
    .name = "davinci_mmc",
    .id = 1,
    .dev = {
        .dma_mask = &mmcsd1_dma_mask,
        .coherent_dma_mask = DMA_BIT_MASK(32),
    },
    .num_resources = ARRAY_SIZE(mmcsd1_resources),
    .resource = mmcsd1_resources,
};


void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
{
    struct platform_device  *pdev = NULL;

    if (WARN_ON(cpu_is_davinci_dm646x()))
        return;

    /* REVISIT: update PINMUX, ARM_IRQMUX, and EDMA_EVTMUX here too;
     * for example if MMCSD1 is used for SDIO, maybe DAT2 is unused.
     *
     * FIXME dm6441 (no MMC/SD), dm357 (one), and dm335 (two) are
     * not handled right here ...
     */
    switch (module) {
    case 1:
        if (cpu_is_davinci_dm355()) {
            /* REVISIT we may not need all these pins if e.g. this
             * is a hard-wired SDIO device...
             */
            davinci_cfg_reg(DM355_SD1_CMD);
            davinci_cfg_reg(DM355_SD1_CLK);
            davinci_cfg_reg(DM355_SD1_DATA0);
            davinci_cfg_reg(DM355_SD1_DATA1);
            davinci_cfg_reg(DM355_SD1_DATA2);
            davinci_cfg_reg(DM355_SD1_DATA3);
        } else if (cpu_is_davinci_dm365()) {
            /* Configure pull down control */
            unsigned v;

            v = __raw_readl(DAVINCI_SYSMOD_VIRT(SYSMOD_PUPDCTL1));
            __raw_writel(v & ~0xfc0,
                    DAVINCI_SYSMOD_VIRT(SYSMOD_PUPDCTL1));

            mmcsd1_resources[0].start = DM365_MMCSD1_BASE;
            mmcsd1_resources[0].end = DM365_MMCSD1_BASE +
                            SZ_4K - 1;
            mmcsd1_resources[2].start = IRQ_DM365_SDIOINT1;
        } else
            break;

        pdev = &davinci_mmcsd1_device;
        break;
    case 0:
        if (cpu_is_davinci_dm355()) {
            mmcsd0_resources[0].start = DM355_MMCSD0_BASE;
            mmcsd0_resources[0].end = DM355_MMCSD0_BASE + SZ_4K - 1;
            mmcsd0_resources[2].start = IRQ_DM355_SDIOINT0;

            /* expose all 6 MMC0 signals:  CLK, CMD, DATA[0..3] */
            davinci_cfg_reg(DM355_MMCSD0);

            /* enable RX EDMA */
            davinci_cfg_reg(DM355_EVT26_MMC0_RX);
        } else if (cpu_is_davinci_dm365()) {
            mmcsd0_resources[0].start = DM365_MMCSD0_BASE;
            mmcsd0_resources[0].end = DM365_MMCSD0_BASE +
                            SZ_4K - 1;
            mmcsd0_resources[2].start = IRQ_DM365_SDIOINT0;
        } else if (cpu_is_davinci_dm644x()) {
            /* REVISIT: should this be in board-init code? */
            /* Power-on 3.3V IO cells */
            __raw_writel(0,
                DAVINCI_SYSMOD_VIRT(SYSMOD_VDD3P3VPWDN));
            /*Set up the pull regiter for MMC */
            davinci_cfg_reg(DM644X_MSTK);
        }

        pdev = &davinci_mmcsd0_device;
        break;
    }

    if (WARN_ON(!pdev))
        return;

    pdev->dev.platform_data = config;
    platform_device_register(pdev);
}

#else

void __init davinci_setup_mmc(int module, struct davinci_mmc_config *config)
{
}

#endif

/*-------------------------------------------------------------------------*/

static struct resource wdt_resources[] = {
    {
        .start  = DAVINCI_WDOG_BASE,
        .end    = DAVINCI_WDOG_BASE + SZ_1K - 1,
        .flags  = IORESOURCE_MEM,
    },
};

struct platform_device davinci_wdt_device = {
    .name       = "watchdog",
    .id     = -1,
    .num_resources  = ARRAY_SIZE(wdt_resources),
    .resource   = wdt_resources,
};

void davinci_restart(char mode, const char *cmd)
{
    davinci_watchdog_reset(&davinci_wdt_device);
}

static void davinci_init_wdt(void)
{
    platform_device_register(&davinci_wdt_device);
}

/*-------------------------------------------------------------------------*/

/*-------------------------------------------------------------------------*/

struct davinci_timer_instance davinci_timer_instance[2] = {
    {
        .base       = DAVINCI_TIMER0_BASE,
        .bottom_irq = IRQ_TINT0_TINT12,
        .top_irq    = IRQ_TINT0_TINT34,
    },
    {
        .base       = DAVINCI_TIMER1_BASE,
        .bottom_irq = IRQ_TINT1_TINT12,
        .top_irq    = IRQ_TINT1_TINT34,
    },
};

/*-------------------------------------------------------------------------*/

static int __init davinci_init_devices(void)
{
    /* please keep these calls, and their implementations above,
     * in alphabetical order so they're easier to sort through.
     */
    davinci_init_wdt();

    return 0;
}
arch_initcall(davinci_init_devices);