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authorHauke Mehrtens <hauke@hauke-m.de>2012-03-13 01:04:48 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-03-15 12:42:07 -0700
commit7a7a4a592f42d9abf3b6cc40620b3f79fef49246 (patch)
treeb51cd6655476657d11127d166b9036b1e73e84de /drivers
parentfa3364b5a2d79b0c94a912b371c92bd3d06bc8fb (diff)
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USB: EHCI: Add a generic platform device driver
This adds a generic driver for platform devices. It works like the PCI driver and is based on it. This is for devices which do not have an own bus but their EHCI controller works like a PCI controller. It will be used for the Broadcom bcma and ssb USB EHCI controller. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/host/Kconfig10
-rw-r--r--drivers/usb/host/ehci-hcd.c5
-rw-r--r--drivers/usb/host/ehci-platform.c198
3 files changed, 213 insertions, 0 deletions
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 1dd6e13077a4..cbd3df8477ba 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -407,6 +407,16 @@ config USB_OHCI_HCD_PLATFORM
If unsure, say N.
+config USB_EHCI_HCD_PLATFORM
+ bool "Generic EHCI driver for a platform device"
+ depends on USB_EHCI_HCD && EXPERIMENTAL
+ default n
+ ---help---
+ Adds an EHCI 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/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 06e2548b549c..c97b2b6378d6 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1376,6 +1376,11 @@ MODULE_LICENSE ("GPL");
#define PLATFORM_DRIVER ehci_ls1x_driver
#endif
+#ifdef CONFIG_USB_EHCI_HCD_PLATFORM
+#include "ehci-platform.c"
+#define PLATFORM_DRIVER ehci_platform_driver
+#endif
+
#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
!defined(XILINX_OF_PLATFORM_DRIVER)
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
new file mode 100644
index 000000000000..d238b4e24bb6
--- /dev/null
+++ b/drivers/usb/host/ehci-platform.c
@@ -0,0 +1,198 @@
+/*
+ * Generic platform ehci driver
+ *
+ * Copyright 2007 Steven Brown <sbrown@cortland.com>
+ * Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
+ *
+ * Derived from the ohci-ssb driver
+ * Copyright 2007 Michael Buesch <m@bues.ch>
+ *
+ * Derived from the EHCI-PCI driver
+ * Copyright (c) 2000-2004 by David Brownell
+ *
+ * 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/ehci_pdriver.h>
+
+static int ehci_platform_reset(struct usb_hcd *hcd)
+{
+ struct platform_device *pdev = to_platform_device(hcd->self.controller);
+ struct usb_ehci_pdata *pdata = pdev->dev.platform_data;
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+ int retval;
+
+ hcd->has_tt = pdata->has_tt;
+ ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
+ ehci->big_endian_desc = pdata->big_endian_desc;
+ ehci->big_endian_mmio = pdata->big_endian_mmio;
+
+ ehci->caps = hcd->regs + pdata->caps_offset;
+ retval = ehci_setup(hcd);
+ if (retval)
+ return retval;
+
+ if (pdata->port_power_on)
+ ehci_port_power(ehci, 1);
+ if (pdata->port_power_off)
+ ehci_port_power(ehci, 0);
+
+ return 0;
+}
+
+static const struct hc_driver ehci_platform_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Generic Platform EHCI Controller",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+
+ .irq = ehci_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+
+ .reset = ehci_platform_reset,
+ .start = ehci_run,
+ .stop = ehci_stop,
+ .shutdown = ehci_shutdown,
+
+ .urb_enqueue = ehci_urb_enqueue,
+ .urb_dequeue = ehci_urb_dequeue,
+ .endpoint_disable = ehci_endpoint_disable,
+ .endpoint_reset = ehci_endpoint_reset,
+
+ .get_frame_number = ehci_get_frame,
+
+ .hub_status_data = ehci_hub_status_data,
+ .hub_control = ehci_hub_control,
+#if defined(CONFIG_PM)
+ .bus_suspend = ehci_bus_suspend,
+ .bus_resume = ehci_bus_resume,
+#endif
+ .relinquish_port = ehci_relinquish_port,
+ .port_handed_over = ehci_port_handed_over,
+
+ .update_device = ehci_update_device,
+
+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+};
+
+static int __devinit ehci_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(&ehci_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 ehci_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 ehci_platform_suspend(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ bool wakeup = device_may_wakeup(dev);
+
+ ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd), wakeup);
+ return 0;
+}
+
+static int ehci_platform_resume(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+
+ ehci_prepare_ports_for_controller_resume(hcd_to_ehci(hcd));
+ return 0;
+}
+
+#else /* !CONFIG_PM */
+#define ehci_platform_suspend NULL
+#define ehci_platform_resume NULL
+#endif /* CONFIG_PM */
+
+static const struct platform_device_id ehci_platform_table[] = {
+ { "ehci-platform", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, ehci_platform_table);
+
+static const struct dev_pm_ops ehci_platform_pm_ops = {
+ .suspend = ehci_platform_suspend,
+ .resume = ehci_platform_resume,
+};
+
+static struct platform_driver ehci_platform_driver = {
+ .id_table = ehci_platform_table,
+ .probe = ehci_platform_probe,
+ .remove = __devexit_p(ehci_platform_remove),
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "ehci-platform",
+ .pm = &ehci_platform_pm_ops,
+ }
+};