Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / mach-imx / ehci-imx35.c

diff --git a/kernel/arch/arm/mach-imx/ehci-imx35.c b/kernel/arch/arm/mach-imx/ehci-imx35.c
new file mode 100644 (file)
index 0000000..f424a54
--- /dev/null
+++ b/kernel/arch/arm/mach-imx/ehci-imx35.c
@@ -0,0 +1,98 @@
+/*
+ * 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 <linux/platform_data/usb-ehci-mxc.h>
+
+#include "ehci.h"
+#include "hardware.h"
+
+#define USBCTRL_OTGBASE_OFFSET 0x600
+
+#define MX35_OTG_SIC_SHIFT     29
+#define MX35_OTG_SIC_MASK      (0x3 << MX35_OTG_SIC_SHIFT)
+#define MX35_OTG_PM_BIT                (1 << 24)
+#define MX35_OTG_PP_BIT                (1 << 11)
+#define MX35_OTG_OCPOL_BIT     (1 << 3)
+
+#define MX35_H1_SIC_SHIFT      21
+#define MX35_H1_SIC_MASK       (0x3 << MX35_H1_SIC_SHIFT)
+#define MX35_H1_PP_BIT         (1 << 18)
+#define MX35_H1_PM_BIT         (1 << 16)
+#define MX35_H1_IPPUE_UP_BIT   (1 << 7)
+#define MX35_H1_IPPUE_DOWN_BIT (1 << 6)
+#define MX35_H1_TLL_BIT                (1 << 5)
+#define MX35_H1_USBTE_BIT      (1 << 4)
+#define MX35_H1_OCPOL_BIT      (1 << 2)
+
+int mx35_initialize_usb_hw(int port, unsigned int flags)
+{
+       unsigned int v;
+
+       v = readl(MX35_IO_ADDRESS(MX35_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));
+
+       switch (port) {
+       case 0: /* OTG port */
+               v &= ~(MX35_OTG_SIC_MASK | MX35_OTG_PM_BIT | MX35_OTG_PP_BIT |
+                       MX35_OTG_OCPOL_BIT);
+               v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX35_OTG_SIC_SHIFT;
+
+               if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
+                       v |= MX35_OTG_PM_BIT;
+
+               if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
+                       v |= MX35_OTG_PP_BIT;
+
+               if (!(flags & MXC_EHCI_OC_PIN_ACTIVE_LOW))
+                       v |= MX35_OTG_OCPOL_BIT;
+
+               break;
+       case 1: /* H1 port */
+               v &= ~(MX35_H1_SIC_MASK | MX35_H1_PM_BIT | MX35_H1_PP_BIT |
+                       MX35_H1_OCPOL_BIT | MX35_H1_TLL_BIT | MX35_H1_USBTE_BIT |
+                       MX35_H1_IPPUE_DOWN_BIT | MX35_H1_IPPUE_UP_BIT);
+               v |= (flags & MXC_EHCI_INTERFACE_MASK) << MX35_H1_SIC_SHIFT;
+
+               if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
+                       v |= MX35_H1_PM_BIT;
+
+               if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
+                       v |= MX35_H1_PP_BIT;
+
+               if (!(flags & MXC_EHCI_OC_PIN_ACTIVE_LOW))
+                       v |= MX35_H1_OCPOL_BIT;
+
+               if (!(flags & MXC_EHCI_TTL_ENABLED))
+                       v |= MX35_H1_TLL_BIT;
+
+               if (flags & MXC_EHCI_INTERNAL_PHY)
+                       v |= MX35_H1_USBTE_BIT;
+
+               if (flags & MXC_EHCI_IPPUE_DOWN)
+                       v |= MX35_H1_IPPUE_DOWN_BIT;
+
+               if (flags & MXC_EHCI_IPPUE_UP)
+                       v |= MX35_H1_IPPUE_UP_BIT;
+
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       writel(v, MX35_IO_ADDRESS(MX35_USB_BASE_ADDR + USBCTRL_OTGBASE_OFFSET));
+
+       return 0;
+}