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usb.c

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

#include <linux/usb/musb.h>
#include <linux/usb/otg.h>

#include <mach/common.h>
#include <mach/hardware.h>
#include <mach/irqs.h>
#include <mach/cputype.h>

#define DAVINCI_USB_OTG_BASE 0x01C64000

#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,
      },
      {
            /* placeholder for the dedicated CPPI IRQ */
            .flags          = IORESOURCE_IRQ,
      },
};

static u64 usb_dmamask = DMA_BIT_MASK(32);

static struct platform_device usb_dev = {
      .name           = "musb_hdrc",
      .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 setup_usb(unsigned mA, unsigned potpgt_msec)
{
      usb_data.power = mA / 2;
      usb_data.potpgt = potpgt_msec / 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);
}

#else

void __init setup_usb(unsigned mA, unsigned potpgt_msec)
{
}

#endif  /* CONFIG_USB_MUSB_HDRC */


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