4 files changed, 247 insertions, 0 deletions

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index b17995829514..1dd6e13077a4 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -397,6 +397,16 @@ config USB_CNS3XXX_OHCI
           Enable support for the CNS3XXX SOC's on-chip OHCI controller.
           It is needed for low-speed USB 1.0 device support.
 
+config USB_OHCI_HCD_PLATFORM
+        bool "Generic OHCI driver for a platform device"
+        depends on USB_OHCI_HCD && EXPERIMENTAL
+        default n
+        ---help---
+          Adds an OHCI host driver for a generic platform device, which
+          provieds a memory space and an irq.
+
+          If unsure, say N.
+
 config USB_OHCI_BIG_ENDIAN_DESC
         bool
         depends on USB_OHCI_HCD
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index c1c550f2a517..ddd54c70d0fd 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1121,6 +1121,11 @@ MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER         ohci_xls_driver
 #endif
 
+#ifdef CONFIG_USB_OHCI_HCD_PLATFORM
+#include "ohci-platform.c"
+#define PLATFORM_DRIVER         ohci_platform_driver
+#endif
+
 #if     !defined(PCI_DRIVER) &&         \
         !defined(PLATFORM_DRIVER) &&    \
         !defined(OMAP1_PLATFORM_DRIVER) &&      \
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
new file mode 100644
index 000000000000..ec5c6791c8b4
--- /dev/null
+++ b/drivers/usb/host/ohci-platform.c
@@ -0,0 +1,194 @@
+/*
+ * Generic platform ohci driver
+ *
+ * Copyright 2007 Michael Buesch <m@bues.ch>
+ * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Derived from the OCHI-SSB driver
+ * Derived from the OHCI-PCI driver
+ * Copyright 1999 Roman Weissgaerber
+ * Copyright 2000-2002 David Brownell
+ * Copyright 1999 Linus Torvalds
+ * Copyright 1999 Gregory P. Smith
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+#include <linux/platform_device.h>
+#include <linux/usb/ohci_pdriver.h>
+
+static int ohci_platform_reset(struct usb_hcd *hcd)
+{
+        struct platform_device *pdev = to_platform_device(hcd->self.controller);
+        struct usb_ohci_pdata *pdata = pdev->dev.platform_data;
+        struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+        int err;
+
+        if (pdata->big_endian_desc)
+                ohci->flags |= OHCI_QUIRK_BE_DESC;
+        if (pdata->big_endian_mmio)
+                ohci->flags |= OHCI_QUIRK_BE_MMIO;
+        if (pdata->no_big_frame_no)
+                ohci->flags |= OHCI_QUIRK_FRAME_NO;
+
+        ohci_hcd_init(ohci);
+        err = ohci_init(ohci);
+
+        return err;
+}
+
+static int ohci_platform_start(struct usb_hcd *hcd)
+{
+        struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+        int err;
+
+        err = ohci_run(ohci);
+        if (err < 0) {
+                ohci_err(ohci, "can't start\n");
+                ohci_stop(hcd);
+        }
+
+        return err;
+}
+
+static const struct hc_driver ohci_platform_hc_driver = {
+        .description            = hcd_name,
+        .product_desc           = "Generic Platform OHCI Controller",
+        .hcd_priv_size          = sizeof(struct ohci_hcd),
+
+        .irq                    = ohci_irq,
+        .flags                  = HCD_MEMORY | HCD_USB11,
+
+        .reset                  = ohci_platform_reset,
+        .start                  = ohci_platform_start,
+        .stop                   = ohci_stop,
+        .shutdown               = ohci_shutdown,
+
+        .urb_enqueue            = ohci_urb_enqueue,
+        .urb_dequeue            = ohci_urb_dequeue,
+        .endpoint_disable       = ohci_endpoint_disable,
+
+        .get_frame_number       = ohci_get_frame,
+
+        .hub_status_data        = ohci_hub_status_data,
+        .hub_control            = ohci_hub_control,
+#ifdef  CONFIG_PM
+        .bus_suspend            = ohci_bus_suspend,
+        .bus_resume             = ohci_bus_resume,
+#endif
+
+        .start_port_reset       = ohci_start_port_reset,
+};
+
+static int __devinit ohci_platform_probe(struct platform_device *dev)
+{
+        struct usb_hcd *hcd;
+        struct resource *res_mem;
+        int irq;
+        int err = -ENOMEM;
+
+        BUG_ON(!dev->dev.platform_data);
+
+        if (usb_disabled())
+                return -ENODEV;
+
+        irq = platform_get_irq(dev, 0);
+        if (irq < 0) {
+                pr_err("no irq provieded");
+                return irq;
+        }
+
+        res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
+        if (!res_mem) {
+                pr_err("no memory recourse provieded");
+                return -ENXIO;
+        }
+
+        hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
+                        dev_name(&dev->dev));
+        if (!hcd)
+                return -ENOMEM;
+
+        hcd->rsrc_start = res_mem->start;
+        hcd->rsrc_len = resource_size(res_mem);
+
+        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+                pr_err("controller already in use");
+                err = -EBUSY;
+                goto err_put_hcd;
+        }
+
+        hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
+        if (!hcd->regs)
+                goto err_release_region;
+        err = usb_add_hcd(hcd, irq, IRQF_SHARED);
+        if (err)
+                goto err_iounmap;
+
+        platform_set_drvdata(dev, hcd);
+
+        return err;
+
+err_iounmap:
+        iounmap(hcd->regs);
+err_release_region:
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_put_hcd:
+        usb_put_hcd(hcd);
+        return err;
+}
+
+static int __devexit ohci_platform_remove(struct platform_device *dev)
+{
+        struct usb_hcd *hcd = platform_get_drvdata(dev);
+
+        usb_remove_hcd(hcd);
+        iounmap(hcd->regs);
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+        usb_put_hcd(hcd);
+        platform_set_drvdata(dev, NULL);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int ohci_platform_suspend(struct device *dev)
+{
+        return 0;
+}
+
+static int ohci_platform_resume(struct device *dev)
+{
+        struct usb_hcd *hcd = dev_get_drvdata(dev);
+
+        ohci_finish_controller_resume(hcd);
+        return 0;
+}
+
+#else /* !CONFIG_PM */
+#define ohci_platform_suspend   NULL
+#define ohci_platform_resume    NULL
+#endif /* CONFIG_PM */
+
+static const struct platform_device_id ohci_platform_table[] = {
+        { "ohci-platform", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(platform, ohci_platform_table);
+
+static const struct dev_pm_ops ohci_platform_pm_ops = {
+        .suspend        = ohci_platform_suspend,
+        .resume         = ohci_platform_resume,
+};
+
+static struct platform_driver ohci_platform_driver = {
+        .id_table       = ohci_platform_table,
+        .probe          = ohci_platform_probe,
+        .remove         = __devexit_p(ohci_platform_remove),
+        .shutdown       = usb_hcd_platform_shutdown,
+        .driver         = {
+                .owner  = THIS_MODULE,
+                .name   = "ohci-platform",
+                .pm     = &ohci_platform_pm_ops,
+        }
+};
diff --git a/include/linux/usb/ohci_pdriver.h b/include/linux/usb/ohci_pdriver.h
new file mode 100644
index 000000000000..2808f2a9cce8
--- /dev/null
+++ b/include/linux/usb/ohci_pdriver.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2012 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __USB_CORE_OHCI_PDRIVER_H
+#define __USB_CORE_OHCI_PDRIVER_H
+
+/**
+ * struct usb_ohci_pdata - platform_data for generic ohci driver
+ *
+ * @big_endian_desc:    BE descriptors
+ * @big_endian_mmio:    BE registers
+ * @no_big_frame_no:    no big endian frame_no shift
+ *
+ * These are general configuration options for the OHCI controller. All of
+ * these options are activating more or less workarounds for some hardware.
+ */
+struct usb_ohci_pdata {
+        unsigned        big_endian_desc:1;
+        unsigned        big_endian_mmio:1;
+        unsigned        no_big_frame_no:1;
+};
+
+#endif /* __USB_CORE_OHCI_PDRIVER_H */