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path: root/drivers/usb/host/ehci-sead3.c
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Diffstat (limited to 'drivers/usb/host/ehci-sead3.c')
-rw-r--r--drivers/usb/host/ehci-sead3.c185
1 files changed, 185 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-sead3.c b/drivers/usb/host/ehci-sead3.c
new file mode 100644
index 000000000..3d86cc2ff
--- /dev/null
+++ b/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");