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msp_usb.c

/*
 * The setup file for USB related hardware on PMC-Sierra MSP processors.
 *
 * Copyright 2006-2007 PMC-Sierra, Inc.
 *
 * 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.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

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

#include <asm/mipsregs.h>

#include <msp_regs.h>
#include <msp_int.h>
#include <msp_prom.h>

#if defined(CONFIG_USB_EHCI_HCD)
static struct resource msp_usbhost_resources [] = {
      [0] = {
            .start      = MSP_USB_BASE_START,
            .end  = MSP_USB_BASE_END,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = MSP_INT_USB,
            .end  = MSP_INT_USB,
            .flags      = IORESOURCE_IRQ,
      },
};

static u64 msp_usbhost_dma_mask = DMA_32BIT_MASK;

static struct platform_device msp_usbhost_device = {
      .name = "pmcmsp-ehci",
      .id   = 0,
      .dev  = {
            .dma_mask = &msp_usbhost_dma_mask,
            .coherent_dma_mask = DMA_32BIT_MASK,
      },
      .num_resources    = ARRAY_SIZE(msp_usbhost_resources),
      .resource   = msp_usbhost_resources,
};
#endif /* CONFIG_USB_EHCI_HCD */

#if defined(CONFIG_USB_GADGET)
static struct resource msp_usbdev_resources [] = {
      [0] = {
            .start      = MSP_USB_BASE,
            .end  = MSP_USB_BASE_END,
            .flags      = IORESOURCE_MEM,
      },
      [1] = {
            .start      = MSP_INT_USB,
            .end  = MSP_INT_USB,
            .flags      = IORESOURCE_IRQ,
      },
};

static u64 msp_usbdev_dma_mask = DMA_32BIT_MASK;

static struct platform_device msp_usbdev_device = {
      .name = "msp71xx_udc",
      .id   = 0,
      .dev  = {
            .dma_mask = &msp_usbdev_dma_mask,
            .coherent_dma_mask = DMA_32BIT_MASK,
      },
      .num_resources    = ARRAY_SIZE(msp_usbdev_resources),
      .resource   = msp_usbdev_resources,
};
#endif /* CONFIG_USB_GADGET */

#if defined(CONFIG_USB_EHCI_HCD) || defined(CONFIG_USB_GADGET)
static struct platform_device *msp_devs[1];
#endif


static int __init msp_usb_setup(void)
{
#if defined(CONFIG_USB_EHCI_HCD) || defined(CONFIG_USB_GADGET)
      char *strp;
      char envstr[32];
      unsigned int val = 0;
      int result = 0;

      /*
       * construct environment name usbmode
       * set usbmode <host/device> as pmon environment var
       */
      snprintf((char *)&envstr[0], sizeof(envstr), "usbmode");

#if defined(CONFIG_USB_EHCI_HCD)
      /* default to host mode */
      val = 1;
#endif

      /* get environment string */
      strp = prom_getenv((char *)&envstr[0]);
      if (strp) {
            if (!strcmp(strp, "device"))
                  val = 0;
      }

      if (val) {
#if defined(CONFIG_USB_EHCI_HCD)
            /* get host mode device */
            msp_devs[0] = &msp_usbhost_device;
            ppfinit("platform add USB HOST done %s.\n",
                      msp_devs[0]->name);

            result = platform_add_devices(msp_devs, ARRAY_SIZE(msp_devs));
#endif /* CONFIG_USB_EHCI_HCD */
      }
#if defined(CONFIG_USB_GADGET)
      else {
            /* get device mode structure */
            msp_devs[0] = &msp_usbdev_device;
            ppfinit("platform add USB DEVICE done %s.\n",
                      msp_devs[0]->name);

            result = platform_add_devices(msp_devs, ARRAY_SIZE(msp_devs));
      }
#endif /* CONFIG_USB_GADGET */
#endif /* CONFIG_USB_EHCI_HCD || CONFIG_USB_GADGET */

      return result;
}

subsys_initcall(msp_usb_setup);

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