diff options
Diffstat (limited to 'arch/arm/mach-mx5/ehci.c')
| -rw-r--r-- | arch/arm/mach-mx5/ehci.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/arch/arm/mach-mx5/ehci.c b/arch/arm/mach-mx5/ehci.c new file mode 100644 index 00000000000..7ce12c804a3 --- /dev/null +++ b/arch/arm/mach-mx5/ehci.c @@ -0,0 +1,156 @@ +/* + * 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_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; +} + |