Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / usb / host / ehci-sead3.c

diff --git a/kernel/drivers/usb/host/ehci-sead3.c b/kernel/drivers/usb/host/ehci-sead3.c
new file mode 100644 (file)
index 0000000..3d86cc2
--- /dev/null
+++ b/kernel/drivers/usb/host/ehci-sead3.c
@@ -0,0 +1,185 @@
+/*
+ * MIPS CI13320A EHCI Host Controller driver
+ * Based on "ehci-au1xxx.c" by K.Boge <karsten.boge@amd.com>
+ *
+ * Copyright (C) 2012 MIPS Technologies, 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.
+ *
+ * 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.
+ */
+
+#include <linux/err.h>
+#include <linux/platform_device.h>
+
+static int ehci_sead3_setup(struct usb_hcd *hcd)
+{
+       int ret;
+       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+       ehci->caps = hcd->regs + 0x100;
+
+#ifdef __BIG_ENDIAN
+       ehci->big_endian_mmio = 1;
+       ehci->big_endian_desc = 1;
+#endif
+
+       ret = ehci_setup(hcd);
+       if (ret)
+               return ret;
+
+       ehci->need_io_watchdog = 0;
+
+       /* Set burst length to 16 words. */
+       ehci_writel(ehci, 0x1010, &ehci->regs->reserved1[1]);
+
+       return ret;
+}
+
+const struct hc_driver ehci_sead3_hc_driver = {
+       .description            = hcd_name,
+       .product_desc           = "SEAD-3 EHCI",
+       .hcd_priv_size          = sizeof(struct ehci_hcd),
+
+       /*
+        * generic hardware linkage
+        */
+       .irq                    = ehci_irq,
+       .flags                  = HCD_MEMORY | HCD_USB2 | HCD_BH,
+
+       /*
+        * basic lifecycle operations
+        *
+        */
+       .reset                  = ehci_sead3_setup,
+       .start                  = ehci_run,
+       .stop                   = ehci_stop,
+       .shutdown               = ehci_shutdown,
+
+       /*
+        * managing i/o requests and associated device resources
+        */
+       .urb_enqueue            = ehci_urb_enqueue,
+       .urb_dequeue            = ehci_urb_dequeue,
+       .endpoint_disable       = ehci_endpoint_disable,
+       .endpoint_reset         = ehci_endpoint_reset,
+
+       /*
+        * scheduling support
+        */
+       .get_frame_number       = ehci_get_frame,
+
+       /*
+        * root hub support
+        */
+       .hub_status_data        = ehci_hub_status_data,
+       .hub_control            = ehci_hub_control,
+       .bus_suspend            = ehci_bus_suspend,
+       .bus_resume             = ehci_bus_resume,
+       .relinquish_port        = ehci_relinquish_port,
+       .port_handed_over       = ehci_port_handed_over,
+
+       .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
+};
+
+static int ehci_hcd_sead3_drv_probe(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd;
+       struct resource *res;
+       int ret;
+
+       if (usb_disabled())
+               return -ENODEV;
+
+       if (pdev->resource[1].flags != IORESOURCE_IRQ) {
+               pr_debug("resource[1] is not IORESOURCE_IRQ");
+               return -ENOMEM;
+       }
+       hcd = usb_create_hcd(&ehci_sead3_hc_driver, &pdev->dev, "SEAD-3");
+       if (!hcd)
+               return -ENOMEM;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(hcd->regs)) {
+               ret = PTR_ERR(hcd->regs);
+               goto err1;
+       }
+       hcd->rsrc_start = res->start;
+       hcd->rsrc_len = resource_size(res);
+
+       /* Root hub has integrated TT. */
+       hcd->has_tt = 1;
+
+       ret = usb_add_hcd(hcd, pdev->resource[1].start,
+                         IRQF_SHARED);
+       if (ret == 0) {
+               platform_set_drvdata(pdev, hcd);
+               device_wakeup_enable(hcd->self.controller);
+               return ret;
+       }
+
+err1:
+       usb_put_hcd(hcd);
+       return ret;
+}
+
+static int ehci_hcd_sead3_drv_remove(struct platform_device *pdev)
+{
+       struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+       usb_remove_hcd(hcd);
+       usb_put_hcd(hcd);
+
+       return 0;
+}
+
+#ifdef CONFIG_PM
+static int ehci_hcd_sead3_drv_suspend(struct device *dev)
+{
+       struct usb_hcd *hcd = dev_get_drvdata(dev);
+       bool do_wakeup = device_may_wakeup(dev);
+
+       return ehci_suspend(hcd, do_wakeup);
+}
+
+static int ehci_hcd_sead3_drv_resume(struct device *dev)
+{
+       struct usb_hcd *hcd = dev_get_drvdata(dev);
+
+       ehci_resume(hcd, false);
+       return 0;
+}
+
+static const struct dev_pm_ops sead3_ehci_pmops = {
+       .suspend        = ehci_hcd_sead3_drv_suspend,
+       .resume         = ehci_hcd_sead3_drv_resume,
+};
+
+#define SEAD3_EHCI_PMOPS (&sead3_ehci_pmops)
+
+#else
+#define SEAD3_EHCI_PMOPS NULL
+#endif
+
+static struct platform_driver ehci_hcd_sead3_driver = {
+       .probe          = ehci_hcd_sead3_drv_probe,
+       .remove         = ehci_hcd_sead3_drv_remove,
+       .shutdown       = usb_hcd_platform_shutdown,
+       .driver = {
+               .name   = "sead3-ehci",
+               .pm     = SEAD3_EHCI_PMOPS,
+       }
+};
+
+MODULE_ALIAS("platform:sead3-ehci");