usb: dwc3: add xHCI Host support

The Designware USB3 IP can be configured with
an internal xHCI. If we're running on such a
version, let's start the xHCI stack.

Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 116 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
new file mode 100644
index 000000000000..9b300a26fceb
--- /dev/null
+++ b/drivers/usb/dwc3/host.c
@@ -0,0 +1,116 @@
+/**
+ * host.c - DesignWare USB3 DRD Controller Host Glue
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Authors: Felipe Balbi <balbi@ti.com>,
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2, as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/list.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+
+#include "core.h"
+#include "io.h"
+
+#include "debug.h"
+
+static struct resource generic_resources[] = {
+        {
+                .flags = IORESOURCE_IRQ,
+        },
+        {
+                .flags = IORESOURCE_MEM,
+        },
+};
+
+int dwc3_host_init(struct dwc3 *dwc)
+{
+        struct platform_device  *xhci;
+        int                     ret;
+
+        xhci = platform_device_alloc("xhci", -1);
+        if (!xhci) {
+                dev_err(dwc->dev, "couldn't allocate xHCI device\n");
+                ret = -ENOMEM;
+                goto err0;
+        }
+
+        dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
+
+        xhci->dev.parent        = dwc->dev;
+        xhci->dev.dma_mask      = dwc->dev->dma_mask;
+        xhci->dev.dma_parms     = dwc->dev->dma_parms;
+
+        dwc->xhci = xhci;
+
+        /* setup resources */
+        generic_resources[0].start = dwc->irq;
+
+        generic_resources[1].start = dwc->res->start;
+        generic_resources[1].end = dwc->res->start + 0x7fff;
+
+        ret = platform_device_add_resources(xhci, generic_resources,
+                        ARRAY_SIZE(generic_resources));
+        if (ret) {
+                dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
+                goto err1;
+        }
+
+        ret = platform_device_add(xhci);
+        if (ret) {
+                dev_err(dwc->dev, "failed to register xHCI device\n");
+                goto err1;
+        }
+
+        return 0;
+
+err1:
+        platform_device_put(xhci);
+
+err0:
+        return ret;
+}
+
+void dwc3_host_exit(struct dwc3 *dwc)
+{
+        platform_device_unregister(dwc->xhci);
+}