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usb-musb.c

/*
 * linux/arch/arm/mach-omap2/usb-musb.c
 *
 * This file will contain the board specific details for the
 * MENTOR USB OTG controller on OMAP3430
 *
 * Copyright (C) 2007-2008 Texas Instruments
 * Copyright (C) 2008 Nokia Corporation
 * Author: Vikram Pandita
 *
 * Generalization by:
 * Felipe Balbi <felipe.balbi@nokia.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/types.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>

#include <linux/usb/musb.h>

#include <mach/hardware.h>
#include <mach/irqs.h>
#include <mach/mux.h>
#include <mach/usb.h>

#ifdef CONFIG_USB_MUSB_SOC

static struct resource musb_resources[] = {
      [0] = { /* start and end set dynamically */
            .flags      = IORESOURCE_MEM,
      },
      [1] = {     /* general IRQ */
            .start      = INT_243X_HS_USB_MC,
            .flags      = IORESOURCE_IRQ,
      },
      [2] = {     /* DMA IRQ */
            .start      = INT_243X_HS_USB_DMA,
            .flags      = IORESOURCE_IRQ,
      },
};

static int clk_on;

static int musb_set_clock(struct clk *clk, int state)
{
      if (state) {
            if (clk_on > 0)
                  return -ENODEV;

            clk_enable(clk);
            clk_on = 1;
      } else {
            if (clk_on == 0)
                  return -ENODEV;

            clk_disable(clk);
            clk_on = 0;
      }

      return 0;
}

static struct musb_hdrc_eps_bits musb_eps[] = {
      {     "ep1_tx", 10,     },
      {     "ep1_rx", 10,     },
      {     "ep2_tx", 9,      },
      {     "ep2_rx", 9,      },
      {     "ep3_tx", 3,      },
      {     "ep3_rx", 3,      },
      {     "ep4_tx", 3,      },
      {     "ep4_rx", 3,      },
      {     "ep5_tx", 3,      },
      {     "ep5_rx", 3,      },
      {     "ep6_tx", 3,      },
      {     "ep6_rx", 3,      },
      {     "ep7_tx", 3,      },
      {     "ep7_rx", 3,      },
      {     "ep8_tx", 2,      },
      {     "ep8_rx", 2,      },
      {     "ep9_tx", 2,      },
      {     "ep9_rx", 2,      },
      {     "ep10_tx", 2,     },
      {     "ep10_rx", 2,     },
      {     "ep11_tx", 2,     },
      {     "ep11_rx", 2,     },
      {     "ep12_tx", 2,     },
      {     "ep12_rx", 2,     },
      {     "ep13_tx", 2,     },
      {     "ep13_rx", 2,     },
      {     "ep14_tx", 2,     },
      {     "ep14_rx", 2,     },
      {     "ep15_tx", 2,     },
      {     "ep15_rx", 2,     },
};

static struct musb_hdrc_config musb_config = {
      .multipoint = 1,
      .dyn_fifo   = 1,
      .soft_con   = 1,
      .dma        = 1,
      .num_eps    = 16,
      .dma_channels     = 7,
      .dma_req_chan     = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3),
      .ram_bits   = 12,
      .eps_bits   = musb_eps,
};

static struct musb_hdrc_platform_data musb_plat = {
#ifdef CONFIG_USB_MUSB_OTG
      .mode       = MUSB_OTG,
#elif defined(CONFIG_USB_MUSB_HDRC_HCD)
      .mode       = MUSB_HOST,
#elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
      .mode       = MUSB_PERIPHERAL,
#endif
      /* .clock is set dynamically */
      .set_clock  = musb_set_clock,
      .config           = &musb_config,

      /* REVISIT charge pump on TWL4030 can supply up to
       * 100 mA ... but this value is board-specific, like
       * "mode", and should be passed to usb_musb_init().
       */
      .power            = 50,             /* up to 100 mA */
};

static u64 musb_dmamask = DMA_BIT_MASK(32);

static struct platform_device musb_device = {
      .name       = "musb_hdrc",
      .id         = -1,
      .dev = {
            .dma_mask         = &musb_dmamask,
            .coherent_dma_mask      = DMA_BIT_MASK(32),
            .platform_data          = &musb_plat,
      },
      .num_resources    = ARRAY_SIZE(musb_resources),
      .resource   = musb_resources,
};

void __init usb_musb_init(void)
{
      if (cpu_is_omap243x())
            musb_resources[0].start = OMAP243X_HS_BASE;
      else
            musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
      musb_resources[0].end = musb_resources[0].start + SZ_8K - 1;

      /*
       * REVISIT: This line can be removed once all the platforms using
       * musb_core.c have been converted to use use clkdev.
       */
      musb_plat.clock = "ick";

      if (platform_device_register(&musb_device) < 0) {
            printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
            return;
      }
}

#else
void __init usb_musb_init(void)
{
}
#endif /* CONFIG_USB_MUSB_SOC */

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