devices.c

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/*
 * linux/arch/arm/mach-omap1/devices.c
 *
 * OMAP1 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/dma-mapping.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>

#include <asm/mach/map.h>

#include <plat/tc.h>
#include <mach/mux.h>
#include <plat/dma.h>
#include <plat/mmc.h>

#include <mach/omap7xx.h>
#include <mach/camera.h>
#include <mach/hardware.h>

#include "common.h"
#include "clock.h"

#if defined(CONFIG_SND_SOC) || defined(CONFIG_SND_SOC_MODULE)

static struct platform_device omap_pcm = {
    .name   = "omap-pcm-audio",
    .id = -1,
};

static void omap_init_audio(void)
{
    platform_device_register(&omap_pcm);
}

#else
static inline void omap_init_audio(void) {}
#endif

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

#if defined(CONFIG_RTC_DRV_OMAP) || defined(CONFIG_RTC_DRV_OMAP_MODULE)

#define OMAP_RTC_BASE       0xfffb4800

static struct resource rtc_resources[] = {
    {
        .start      = OMAP_RTC_BASE,
        .end        = OMAP_RTC_BASE + 0x5f,
        .flags      = IORESOURCE_MEM,
    },
    {
        .start      = INT_RTC_TIMER,
        .flags      = IORESOURCE_IRQ,
    },
    {
        .start      = INT_RTC_ALARM,
        .flags      = IORESOURCE_IRQ,
    },
};

static struct platform_device omap_rtc_device = {
    .name           = "omap_rtc",
    .id             = -1,
    .num_resources  = ARRAY_SIZE(rtc_resources),
    .resource   = rtc_resources,
};

static void omap_init_rtc(void)
{
    (void) platform_device_register(&omap_rtc_device);
}
#else
static inline void omap_init_rtc(void) {}
#endif

static inline void omap_init_mbox(void) { }

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

#if defined(CONFIG_MMC_OMAP) || defined(CONFIG_MMC_OMAP_MODULE)

static inline void omap1_mmc_mux(struct omap_mmc_platform_data *mmc_controller,
            int controller_nr)
{
    if (controller_nr == 0) {
        if (cpu_is_omap7xx()) {
            omap_cfg_reg(MMC_7XX_CMD);
            omap_cfg_reg(MMC_7XX_CLK);
            omap_cfg_reg(MMC_7XX_DAT0);
        } else {
            omap_cfg_reg(MMC_CMD);
            omap_cfg_reg(MMC_CLK);
            omap_cfg_reg(MMC_DAT0);
        }

        if (cpu_is_omap1710()) {
            omap_cfg_reg(M15_1710_MMC_CLKI);
            omap_cfg_reg(P19_1710_MMC_CMDDIR);
            omap_cfg_reg(P20_1710_MMC_DATDIR0);
        }
        if (mmc_controller->slots[0].wires == 4 && !cpu_is_omap7xx()) {
            omap_cfg_reg(MMC_DAT1);
            /* NOTE: DAT2 can be on W10 (here) or M15 */
            if (!mmc_controller->slots[0].nomux)
                omap_cfg_reg(MMC_DAT2);
            omap_cfg_reg(MMC_DAT3);
        }
    }

    /* Block 2 is on newer chips, and has many pinout options */
    if (cpu_is_omap16xx() && controller_nr == 1) {
        if (!mmc_controller->slots[1].nomux) {
            omap_cfg_reg(Y8_1610_MMC2_CMD);
            omap_cfg_reg(Y10_1610_MMC2_CLK);
            omap_cfg_reg(R18_1610_MMC2_CLKIN);
            omap_cfg_reg(W8_1610_MMC2_DAT0);
            if (mmc_controller->slots[1].wires == 4) {
                omap_cfg_reg(V8_1610_MMC2_DAT1);
                omap_cfg_reg(W15_1610_MMC2_DAT2);
                omap_cfg_reg(R10_1610_MMC2_DAT3);
            }

            /* These are needed for the level shifter */
            omap_cfg_reg(V9_1610_MMC2_CMDDIR);
            omap_cfg_reg(V5_1610_MMC2_DATDIR0);
            omap_cfg_reg(W19_1610_MMC2_DATDIR1);
        }

        /* Feedback clock must be set on OMAP-1710 MMC2 */
        if (cpu_is_omap1710())
            omap_writel(omap_readl(MOD_CONF_CTRL_1) | (1 << 24),
                    MOD_CONF_CTRL_1);
    }
}

#define OMAP_MMC_NR_RES     4

/*
 * Register MMC devices.
 */
static int __init omap_mmc_add(const char *name, int id, unsigned long base,
                unsigned long size, unsigned int irq,
                unsigned rx_req, unsigned tx_req,
                struct omap_mmc_platform_data *data)
{
    struct platform_device *pdev;
    struct resource res[OMAP_MMC_NR_RES];
    int ret;

    pdev = platform_device_alloc(name, id);
    if (!pdev)
        return -ENOMEM;

    memset(res, 0, OMAP_MMC_NR_RES * sizeof(struct resource));
    res[0].start = base;
    res[0].end = base + size - 1;
    res[0].flags = IORESOURCE_MEM;
    res[1].start = res[1].end = irq;
    res[1].flags = IORESOURCE_IRQ;
    res[2].start = rx_req;
    res[2].name = "rx";
    res[2].flags = IORESOURCE_DMA;
    res[3].start = tx_req;
    res[3].name = "tx";
    res[3].flags = IORESOURCE_DMA;

    ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
    if (ret == 0)
        ret = platform_device_add_data(pdev, data, sizeof(*data));
    if (ret)
        goto fail;

    ret = platform_device_add(pdev);
    if (ret)
        goto fail;

    /* return device handle to board setup code */
    data->dev = &pdev->dev;
    return 0;

fail:
    platform_device_put(pdev);
    return ret;
}

void __init omap1_init_mmc(struct omap_mmc_platform_data **mmc_data,
            int nr_controllers)
{
    int i;

    for (i = 0; i < nr_controllers; i++) {
        unsigned long base, size;
        unsigned rx_req, tx_req;
        unsigned int irq = 0;

        if (!mmc_data[i])
            continue;

        omap1_mmc_mux(mmc_data[i], i);

        switch (i) {
        case 0:
            base = OMAP1_MMC1_BASE;
            irq = INT_MMC;
            rx_req = OMAP_DMA_MMC_RX;
            tx_req = OMAP_DMA_MMC_TX;
            break;
        case 1:
            if (!cpu_is_omap16xx())
                return;
            base = OMAP1_MMC2_BASE;
            irq = INT_1610_MMC2;
            rx_req = OMAP_DMA_MMC2_RX;
            tx_req = OMAP_DMA_MMC2_TX;
            break;
        default:
            continue;
        }
        size = OMAP1_MMC_SIZE;

        omap_mmc_add("mmci-omap", i, base, size, irq,
                rx_req, tx_req, mmc_data[i]);
    }
}

#endif

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

/* OMAP7xx SPI support */
#if defined(CONFIG_SPI_OMAP_100K) || defined(CONFIG_SPI_OMAP_100K_MODULE)

struct platform_device omap_spi1 = {
    .name           = "omap1_spi100k",
    .id             = 1,
};

struct platform_device omap_spi2 = {
    .name           = "omap1_spi100k",
    .id             = 2,
};

static void omap_init_spi100k(void)
{
    omap_spi1.dev.platform_data = ioremap(OMAP7XX_SPI1_BASE, 0x7ff);
    if (omap_spi1.dev.platform_data)
        platform_device_register(&omap_spi1);

    omap_spi2.dev.platform_data = ioremap(OMAP7XX_SPI2_BASE, 0x7ff);
    if (omap_spi2.dev.platform_data)
        platform_device_register(&omap_spi2);
}

#else
static inline void omap_init_spi100k(void)
{
}
#endif


#define OMAP1_CAMERA_BASE   0xfffb6800
#define OMAP1_CAMERA_IOSIZE 0x1c

static struct resource omap1_camera_resources[] = {
    [0] = {
        .start  = OMAP1_CAMERA_BASE,
        .end    = OMAP1_CAMERA_BASE + OMAP1_CAMERA_IOSIZE - 1,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = INT_CAMERA,
        .flags  = IORESOURCE_IRQ,
    },
};

static u64 omap1_camera_dma_mask = DMA_BIT_MASK(32);

static struct platform_device omap1_camera_device = {
    .name       = "omap1-camera",
    .id     = 0, /* This is used to put cameras on this interface */
    .dev        = {
        .dma_mask       = &omap1_camera_dma_mask,
        .coherent_dma_mask  = DMA_BIT_MASK(32),
    },
    .num_resources  = ARRAY_SIZE(omap1_camera_resources),
    .resource   = omap1_camera_resources,
};

void __init omap1_camera_init(void *info)
{
    struct platform_device *dev = &omap1_camera_device;
    int ret;

    dev->dev.platform_data = info;

    ret = platform_device_register(dev);
    if (ret)
        dev_err(&dev->dev, "unable to register device: %d\n", ret);
}


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

static inline void omap_init_sti(void) {}

/* Numbering for the SPI-capable controllers when used for SPI:
 * spi      = 1
 * uwire    = 2
 * mmc1..2  = 3..4
 * mcbsp1..3    = 5..7
 */

#if defined(CONFIG_SPI_OMAP_UWIRE) || defined(CONFIG_SPI_OMAP_UWIRE_MODULE)

#define OMAP_UWIRE_BASE     0xfffb3000

static struct resource uwire_resources[] = {
    {
        .start      = OMAP_UWIRE_BASE,
        .end        = OMAP_UWIRE_BASE + 0x20,
        .flags      = IORESOURCE_MEM,
    },
};

static struct platform_device omap_uwire_device = {
    .name      = "omap_uwire",
    .id      = -1,
    .num_resources  = ARRAY_SIZE(uwire_resources),
    .resource   = uwire_resources,
};

static void omap_init_uwire(void)
{
    /* FIXME define and use a boot tag; not all boards will be hooking
     * up devices to the microwire controller, and multi-board configs
     * mean that CONFIG_SPI_OMAP_UWIRE may be configured anyway...
     */

    /* board-specific code must configure chipselects (only a few
     * are normally used) and SCLK/SDI/SDO (each has two choices).
     */
    (void) platform_device_register(&omap_uwire_device);
}
#else
static inline void omap_init_uwire(void) {}
#endif


#define OMAP1_RNG_BASE      0xfffe5000

static struct resource omap1_rng_resources[] = {
    {
        .start      = OMAP1_RNG_BASE,
        .end        = OMAP1_RNG_BASE + 0x4f,
        .flags      = IORESOURCE_MEM,
    },
};

static struct platform_device omap1_rng_device = {
    .name       = "omap_rng",
    .id     = -1,
    .num_resources  = ARRAY_SIZE(omap1_rng_resources),
    .resource   = omap1_rng_resources,
};

static void omap1_init_rng(void)
{
    if (!cpu_is_omap16xx())
        return;

    (void) platform_device_register(&omap1_rng_device);
}

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

/*
 * This gets called after board-specific INIT_MACHINE, and initializes most
 * on-chip peripherals accessible on this board (except for few like USB):
 *
 *  (a) Does any "standard config" pin muxing needed.  Board-specific
 *  code will have muxed GPIO pins and done "nonstandard" setup;
 *  that code could live in the boot loader.
 *  (b) Populating board-specific platform_data with the data drivers
 *  rely on to handle wiring variations.
 *  (c) Creating platform devices as meaningful on this board and
 *  with this kernel configuration.
 *
 * Claiming GPIOs, and setting their direction and initial values, is the
 * responsibility of the device drivers.  So is responding to probe().
 *
 * Board-specific knowledge like creating devices or pin setup is to be
 * kept out of drivers as much as possible.  In particular, pin setup
 * may be handled by the boot loader, and drivers should expect it will
 * normally have been done by the time they're probed.
 */
static int __init omap1_init_devices(void)
{
    if (!cpu_class_is_omap1())
        return -ENODEV;

    omap_sram_init();
    omap1_clk_late_init();

    /* please keep these calls, and their implementations above,
     * in alphabetical order so they're easier to sort through.
     */

    omap_init_audio();
    omap_init_mbox();
    omap_init_rtc();
    omap_init_spi100k();
    omap_init_sti();
    omap_init_uwire();
    omap1_init_rng();

    return 0;
}
arch_initcall(omap1_init_devices);

#if defined(CONFIG_OMAP_WATCHDOG) || defined(CONFIG_OMAP_WATCHDOG_MODULE)

static struct resource wdt_resources[] = {
    {
        .start      = 0xfffeb000,
        .end        = 0xfffeb07F,
        .flags      = IORESOURCE_MEM,
    },
};

static struct platform_device omap_wdt_device = {
    .name      = "omap_wdt",
    .id      = -1,
    .num_resources  = ARRAY_SIZE(wdt_resources),
    .resource   = wdt_resources,
};

static int __init omap_init_wdt(void)
{
    if (!cpu_is_omap16xx())
        return -ENODEV;

    return platform_device_register(&omap_wdt_device);
}
subsys_initcall(omap_init_wdt);
#endif