ehci.c
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/*
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
* Copyright (C) 2010 Freescale Semiconductor, 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 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.
*/
#include <linux/platform_device.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <mach/mxc_ehci.h>
#define MXC_OTG_OFFSET 0
#define MXC_H1_OFFSET 0x200
#define MXC_H2_OFFSET 0x400
/* USB_CTRL */
#define MXC_OTG_UCTRL_OWIE_BIT (1 << 27) /* OTG wakeup intr enable */
#define MXC_OTG_UCTRL_OPM_BIT (1 << 24) /* OTG power mask */
#define MXC_H1_UCTRL_H1UIE_BIT (1 << 12) /* Host1 ULPI interrupt enable */
#define MXC_H1_UCTRL_H1WIE_BIT (1 << 11) /* HOST1 wakeup intr enable */
#define MXC_H1_UCTRL_H1PM_BIT (1 << 8) /* HOST1 power mask */
/* USB_PHY_CTRL_FUNC */
#define MXC_OTG_PHYCTRL_OC_DIS_BIT (1 << 8) /* OTG Disable Overcurrent Event */
#define MXC_H1_OC_DIS_BIT (1 << 5) /* UH1 Disable Overcurrent Event */
/* USBH2CTRL */
#define MXC_H2_UCTRL_H2UIE_BIT (1 << 8)
#define MXC_H2_UCTRL_H2WIE_BIT (1 << 7)
#define MXC_H2_UCTRL_H2PM_BIT (1 << 4)
#define MXC_USBCMD_OFFSET 0x140
/* USBCMD */
#define MXC_UCMD_ITC_NO_THRESHOLD_MASK (~(0xff << 16)) /* Interrupt Threshold Control */
int mx51_initialize_usb_hw(int port, unsigned int flags)
{
unsigned int v;
void __iomem *usb_base;
void __iomem *usbotg_base;
void __iomem *usbother_base;
int ret = 0;
usb_base = ioremap(MX51_USB_OTG_BASE_ADDR, SZ_4K);
if (!usb_base) {
printk(KERN_ERR "%s(): ioremap failed\n", __func__);
return -ENOMEM;
}
switch (port) {
case 0: /* OTG port */
usbotg_base = usb_base + MXC_OTG_OFFSET;
break;
case 1: /* Host 1 port */
usbotg_base = usb_base + MXC_H1_OFFSET;
break;
case 2: /* Host 2 port */
usbotg_base = usb_base + MXC_H2_OFFSET;
break;
default:
printk(KERN_ERR"%s no such port %d\n", __func__, port);
ret = -ENOENT;
goto error;
}
usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
switch (port) {
case 0: /*OTG port */
if (flags & MXC_EHCI_INTERNAL_PHY) {
v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
if (flags & MXC_EHCI_POWER_PINS_ENABLED) {
/* OC/USBPWR is not used */
v |= MXC_OTG_PHYCTRL_OC_DIS_BIT;
} else {
/* OC/USBPWR is used */
v &= ~MXC_OTG_PHYCTRL_OC_DIS_BIT;
}
__raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
v = __raw_readl(usbother_base + MXC_USBCTRL_OFFSET);
if (flags & MXC_EHCI_WAKEUP_ENABLED)
v |= MXC_OTG_UCTRL_OWIE_BIT;/* OTG wakeup enable */
else
v &= ~MXC_OTG_UCTRL_OWIE_BIT;/* OTG wakeup disable */
if (flags & MXC_EHCI_POWER_PINS_ENABLED)
v |= MXC_OTG_UCTRL_OPM_BIT;
else
v &= ~MXC_OTG_UCTRL_OPM_BIT;
__raw_writel(v, usbother_base + MXC_USBCTRL_OFFSET);
}
break;
case 1: /* Host 1 */
/*Host ULPI */
v = __raw_readl(usbother_base + MXC_USBCTRL_OFFSET);
if (flags & MXC_EHCI_WAKEUP_ENABLED) {
/* HOST1 wakeup/ULPI intr enable */
v |= (MXC_H1_UCTRL_H1WIE_BIT | MXC_H1_UCTRL_H1UIE_BIT);
} else {
/* HOST1 wakeup/ULPI intr disable */
v &= ~(MXC_H1_UCTRL_H1WIE_BIT | MXC_H1_UCTRL_H1UIE_BIT);
}
if (flags & MXC_EHCI_POWER_PINS_ENABLED)
v &= ~MXC_H1_UCTRL_H1PM_BIT; /* HOST1 power mask used*/
else
v |= MXC_H1_UCTRL_H1PM_BIT; /* HOST1 power mask used*/
__raw_writel(v, usbother_base + MXC_USBCTRL_OFFSET);
v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
if (flags & MXC_EHCI_POWER_PINS_ENABLED)
v &= ~MXC_H1_OC_DIS_BIT; /* OC is used */
else
v |= MXC_H1_OC_DIS_BIT; /* OC is not used */
__raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
v = __raw_readl(usbotg_base + MXC_USBCMD_OFFSET);
if (flags & MXC_EHCI_ITC_NO_THRESHOLD)
/* Interrupt Threshold Control:Immediate (no threshold) */
v &= MXC_UCMD_ITC_NO_THRESHOLD_MASK;
__raw_writel(v, usbotg_base + MXC_USBCMD_OFFSET);
break;
case 2: /* Host 2 ULPI */
v = __raw_readl(usbother_base + MXC_USBH2CTRL_OFFSET);
if (flags & MXC_EHCI_WAKEUP_ENABLED) {
/* HOST1 wakeup/ULPI intr enable */
v |= (MXC_H2_UCTRL_H2WIE_BIT | MXC_H2_UCTRL_H2UIE_BIT);
} else {
/* HOST1 wakeup/ULPI intr disable */
v &= ~(MXC_H2_UCTRL_H2WIE_BIT | MXC_H2_UCTRL_H2UIE_BIT);
}
if (flags & MXC_EHCI_POWER_PINS_ENABLED)
v &= ~MXC_H2_UCTRL_H2PM_BIT; /* HOST2 power mask used*/
else
v |= MXC_H2_UCTRL_H2PM_BIT; /* HOST2 power mask used*/
__raw_writel(v, usbother_base + MXC_USBH2CTRL_OFFSET);
break;
}
error:
iounmap(usb_base);
return ret;
}