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fsl_usb.h

/*
 * Copyright 2005-2009 Freescale Semiconductor, Inc. All Rights Reserved.
 */

/*
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

/*
 * USB Host side, platform-specific functionality.
 */

#include <linux/usb/fsl_xcvr.h>
#include <mach/arc_otg.h>

static void fsl_setup_phy(struct ehci_hcd *ehci,
                    enum fsl_usb2_phy_modes phy_mode,
                    int port_offset);

static inline void fsl_platform_usb_setup(struct ehci_hcd *ehci)
{
      struct fsl_usb2_platform_data *pdata;

      pdata = ehci_to_hcd(ehci)->self.controller->platform_data;
      fsl_setup_phy(ehci, pdata->phy_mode, 0);
}

static inline void fsl_platform_set_host_mode(struct usb_hcd *hcd)
{
      unsigned int temp;
      struct fsl_usb2_platform_data *pdata;

      pdata = hcd->self.controller->platform_data;

      if (pdata->xcvr_ops && pdata->xcvr_ops->set_host)
            pdata->xcvr_ops->set_host();

      /* set host mode */
      temp = readl(hcd->regs + 0x1a8);
      writel(temp | USBMODE_CM_HOST, hcd->regs + 0x1a8);
}

/* Needed for enable PP and i2c/serial transceivers */
static inline void
fsl_platform_set_vbus_power(struct fsl_usb2_platform_data *pdata, int on)
{
      u32 temp;

      /* HCSPARAMS */
      temp = readl(pdata->regs + 0x104);
      /* Port Power Control */
      if (temp & HCSPARAMS_PPC) {
            temp = readl(pdata->regs + FSL_SOC_USB_PORTSC1);
            if (on)
                  temp |= PORT_POWER;
            else
                  temp &= ~PORT_POWER;

            writel(temp, pdata->regs + FSL_SOC_USB_PORTSC1);
      }

      if (pdata->xcvr_ops && pdata->xcvr_ops->set_vbus_power)
            pdata->xcvr_ops->set_vbus_power(pdata->xcvr_ops, pdata, on);
}

/* Set USB AHB burst length for host */
static inline void fsl_platform_set_ahb_burst(struct usb_hcd *hcd)
{
      struct fsl_usb2_platform_data *pdata;
      unsigned int temp;

      pdata = hcd->self.controller->platform_data;
      if (pdata->change_ahb_burst) {
            temp = readl(hcd->regs + FSL_SOC_USB_SBUSCFG);
            writel((temp & (~(0x7))) | pdata->ahb_burst_mode,
                  hcd->regs + FSL_SOC_USB_SBUSCFG);
      }

      /* Increase TX fifo threshold for USB+ATA for i.mx35 2.0 */
      if (cpu_is_mx35_rev(CHIP_REV_2_0) >= 1) {
            temp = readl(hcd->regs + FSL_SOC_USB_TXFILLTUNING);
            /* Change TX FIFO threshold to be 0x20 */
            writel((temp & (~(0x3f << 16))) | (0x20 << 16),
                  hcd->regs + FSL_SOC_USB_TXFILLTUNING);
      }
}

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