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/*
* Freescale i.MX28 USB Host driver
*
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
* on behalf of DENX Software Engineering GmbH
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include "ehci.h"
#if (CONFIG_EHCI_MXS_PORT != 0) && (CONFIG_EHCI_MXS_PORT != 1)
#error "MXS EHCI: Invalid port selected!"
#endif
#ifndef CONFIG_EHCI_MXS_PORT
#error "MXS EHCI: Please define correct port using CONFIG_EHCI_MXS_PORT!"
#endif
static struct ehci_mxs {
struct mxs_usb_regs *usb_regs;
struct mxs_usbphy_regs *phy_regs;
} ehci_mxs;
int mxs_ehci_get_port(struct ehci_mxs *mxs_usb, int port)
{
uint32_t usb_base, phy_base;
switch (port) {
case 0:
usb_base = MXS_USBCTRL0_BASE;
phy_base = MXS_USBPHY0_BASE;
break;
case 1:
usb_base = MXS_USBCTRL1_BASE;
phy_base = MXS_USBPHY1_BASE;
break;
default:
printf("CONFIG_EHCI_MXS_PORT (port = %d)\n", port);
return -1;
}
mxs_usb->usb_regs = (struct mxs_usb_regs *)usb_base;
mxs_usb->phy_regs = (struct mxs_usbphy_regs *)phy_base;
return 0;
}
/* This DIGCTL register ungates clock to USB */
#define HW_DIGCTL_CTRL 0x8001c000
#define HW_DIGCTL_CTRL_USB0_CLKGATE (1 << 2)
#define HW_DIGCTL_CTRL_USB1_CLKGATE (1 << 16)
int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
int ret;
uint32_t usb_base, cap_base;
struct mxs_register_32 *digctl_ctrl =
(struct mxs_register_32 *)HW_DIGCTL_CTRL;
struct mxs_clkctrl_regs *clkctrl_regs =
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
ret = mxs_ehci_get_port(&ehci_mxs, CONFIG_EHCI_MXS_PORT);
if (ret)
return ret;
/* Reset the PHY block */
writel(USBPHY_CTRL_SFTRST, &ehci_mxs.phy_regs->hw_usbphy_ctrl_set);
udelay(10);
writel(USBPHY_CTRL_SFTRST | USBPHY_CTRL_CLKGATE,
&ehci_mxs.phy_regs->hw_usbphy_ctrl_clr);
/* Enable USB clock */
writel(CLKCTRL_PLL0CTRL0_EN_USB_CLKS | CLKCTRL_PLL0CTRL0_POWER,
&clkctrl_regs->hw_clkctrl_pll0ctrl0_set);
writel(CLKCTRL_PLL1CTRL0_EN_USB_CLKS | CLKCTRL_PLL1CTRL0_POWER,
&clkctrl_regs->hw_clkctrl_pll1ctrl0_set);
writel(HW_DIGCTL_CTRL_USB0_CLKGATE | HW_DIGCTL_CTRL_USB1_CLKGATE,
&digctl_ctrl->reg_clr);
/* Start USB PHY */
writel(0, &ehci_mxs.phy_regs->hw_usbphy_pwd);
/* Enable UTMI+ Level 2 and Level 3 compatibility */
writel(USBPHY_CTRL_ENUTMILEVEL3 | USBPHY_CTRL_ENUTMILEVEL2 | 1,
&ehci_mxs.phy_regs->hw_usbphy_ctrl_set);
usb_base = ((uint32_t)ehci_mxs.usb_regs) + 0x100;
*hccr = (struct ehci_hccr *)usb_base;
cap_base = ehci_readl(&(*hccr)->cr_capbase);
*hcor = (struct ehci_hcor *)(usb_base + HC_LENGTH(cap_base));
return 0;
}
int ehci_hcd_stop(int index)
{
int ret;
uint32_t usb_base, cap_base, tmp;
struct mxs_register_32 *digctl_ctrl =
(struct mxs_register_32 *)HW_DIGCTL_CTRL;
struct mxs_clkctrl_regs *clkctrl_regs =
(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
ret = mxs_ehci_get_port(&ehci_mxs, CONFIG_EHCI_MXS_PORT);
if (ret)
return ret;
/* Stop the USB port */
usb_base = ((uint32_t)ehci_mxs.usb_regs) + 0x100;
hccr = (struct ehci_hccr *)usb_base;
cap_base = ehci_readl(&hccr->cr_capbase);
hcor = (struct ehci_hcor *)(usb_base + HC_LENGTH(cap_base));
tmp = ehci_readl(&hcor->or_usbcmd);
tmp &= ~CMD_RUN;
ehci_writel(tmp, &hcor->or_usbcmd);
/* Disable the PHY */
tmp = USBPHY_PWD_RXPWDRX | USBPHY_PWD_RXPWDDIFF |
USBPHY_PWD_RXPWD1PT1 | USBPHY_PWD_RXPWDENV |
USBPHY_PWD_TXPWDV2I | USBPHY_PWD_TXPWDIBIAS |
USBPHY_PWD_TXPWDFS;
writel(tmp, &ehci_mxs.phy_regs->hw_usbphy_pwd);
/* Disable USB clock */
writel(CLKCTRL_PLL0CTRL0_EN_USB_CLKS,
&clkctrl_regs->hw_clkctrl_pll0ctrl0_clr);
writel(CLKCTRL_PLL1CTRL0_EN_USB_CLKS,
&clkctrl_regs->hw_clkctrl_pll1ctrl0_clr);
/* Gate off the USB clock */
writel(HW_DIGCTL_CTRL_USB0_CLKGATE | HW_DIGCTL_CTRL_USB1_CLKGATE,
&digctl_ctrl->reg_set);
return 0;
}
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