usb.c

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/*
 * USB
 */
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>

#include <linux/usb/musb.h>

#include <mach/common.h>
#include <mach/irqs.h>
#include <mach/cputype.h>
#include <linux/platform_data/usb-davinci.h>

#define DAVINCI_USB_OTG_BASE    0x01c64000

#define DA8XX_USB0_BASE     0x01e00000
#define DA8XX_USB1_BASE     0x01e25000

#if defined(CONFIG_USB_MUSB_HDRC) || defined(CONFIG_USB_MUSB_HDRC_MODULE)
static struct musb_hdrc_eps_bits musb_eps[] = {
    { "ep1_tx", 8, },
    { "ep1_rx", 8, },
    { "ep2_tx", 8, },
    { "ep2_rx", 8, },
    { "ep3_tx", 5, },
    { "ep3_rx", 5, },
    { "ep4_tx", 5, },
    { "ep4_rx", 5, },
};

static struct musb_hdrc_config musb_config = {
    .multipoint = true,
    .dyn_fifo   = true,
    .soft_con   = true,
    .dma        = true,

    .num_eps    = 5,
    .dma_channels   = 8,
    .ram_bits   = 10,
    .eps_bits   = musb_eps,
};

static struct musb_hdrc_platform_data usb_data = {
#if defined(CONFIG_USB_MUSB_OTG)
    /* OTG requires a Mini-AB connector */
    .mode           = MUSB_OTG,
#elif defined(CONFIG_USB_MUSB_PERIPHERAL)
    .mode           = MUSB_PERIPHERAL,
#elif defined(CONFIG_USB_MUSB_HOST)
    .mode           = MUSB_HOST,
#endif
    .clock      = "usb",
    .config     = &musb_config,
};

static struct resource usb_resources[] = {
    {
        /* physical address */
        .start          = DAVINCI_USB_OTG_BASE,
        .end            = DAVINCI_USB_OTG_BASE + 0x5ff,
        .flags          = IORESOURCE_MEM,
    },
    {
        .start          = IRQ_USBINT,
        .flags          = IORESOURCE_IRQ,
        .name       = "mc"
    },
    {
        /* placeholder for the dedicated CPPI IRQ */
        .flags          = IORESOURCE_IRQ,
        .name       = "dma"
    },
};

static u64 usb_dmamask = DMA_BIT_MASK(32);

static struct platform_device usb_dev = {
    .name           = "musb-davinci",
    .id             = -1,
    .dev = {
        .platform_data      = &usb_data,
        .dma_mask       = &usb_dmamask,
        .coherent_dma_mask      = DMA_BIT_MASK(32),
    },
    .resource       = usb_resources,
    .num_resources  = ARRAY_SIZE(usb_resources),
};

void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
{
    usb_data.power = mA > 510 ? 255 : mA / 2;
    usb_data.potpgt = (potpgt_ms + 1) / 2;

    if (cpu_is_davinci_dm646x()) {
        /* Override the defaults as DM6467 uses different IRQs. */
        usb_dev.resource[1].start = IRQ_DM646X_USBINT;
        usb_dev.resource[2].start = IRQ_DM646X_USBDMAINT;
    } else  /* other devices don't have dedicated CPPI IRQ */
        usb_dev.num_resources = 2;

    platform_device_register(&usb_dev);
}

#ifdef CONFIG_ARCH_DAVINCI_DA8XX
static struct resource da8xx_usb20_resources[] = {
    {
        .start      = DA8XX_USB0_BASE,
        .end        = DA8XX_USB0_BASE + SZ_64K - 1,
        .flags      = IORESOURCE_MEM,
    },
    {
        .start      = IRQ_DA8XX_USB_INT,
        .flags      = IORESOURCE_IRQ,
        .name       = "mc",
    },
};

int __init da8xx_register_usb20(unsigned mA, unsigned potpgt)
{
    usb_data.clock  = "usb20";
    usb_data.power  = mA > 510 ? 255 : mA / 2;
    usb_data.potpgt = (potpgt + 1) / 2;

    usb_dev.resource = da8xx_usb20_resources;
    usb_dev.num_resources = ARRAY_SIZE(da8xx_usb20_resources);
    usb_dev.name = "musb-da8xx";

    return platform_device_register(&usb_dev);
}
#endif  /* CONFIG_DAVINCI_DA8XX */

#else

void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
{
}

#ifdef CONFIG_ARCH_DAVINCI_DA8XX
int __init da8xx_register_usb20(unsigned mA, unsigned potpgt)
{
    return 0;
}
#endif

#endif  /* CONFIG_USB_MUSB_HDRC */

#ifdef  CONFIG_ARCH_DAVINCI_DA8XX
static struct resource da8xx_usb11_resources[] = {
    [0] = {
        .start  = DA8XX_USB1_BASE,
        .end    = DA8XX_USB1_BASE + SZ_4K - 1,
        .flags  = IORESOURCE_MEM,
    },
    [1] = {
        .start  = IRQ_DA8XX_IRQN,
        .end    = IRQ_DA8XX_IRQN,
        .flags  = IORESOURCE_IRQ,
    },
};

static u64 da8xx_usb11_dma_mask = DMA_BIT_MASK(32);

static struct platform_device da8xx_usb11_device = {
    .name       = "ohci",
    .id     = 0,
    .dev = {
        .dma_mask       = &da8xx_usb11_dma_mask,
        .coherent_dma_mask  = DMA_BIT_MASK(32),
    },
    .num_resources  = ARRAY_SIZE(da8xx_usb11_resources),
    .resource   = da8xx_usb11_resources,
};

int __init da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata)
{
    da8xx_usb11_device.dev.platform_data = pdata;
    return platform_device_register(&da8xx_usb11_device);
}
#endif  /* CONFIG_DAVINCI_DA8XX */