1 files changed, 91 insertions, 0 deletions

diff --git a/arch/tile/gxio/usb_host.c b/arch/tile/gxio/usb_host.c
new file mode 100644
index 000000000000..66b002f54ecc
--- /dev/null
+++ b/arch/tile/gxio/usb_host.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2012 Tilera Corporation. All Rights Reserved.
+ *
+ *   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, version 2.
+ *
+ *   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, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+/*
+ *
+ * Implementation of USB gxio calls.
+ */
+
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+
+#include <gxio/iorpc_globals.h>
+#include <gxio/iorpc_usb_host.h>
+#include <gxio/kiorpc.h>
+#include <gxio/usb_host.h>
+
+int gxio_usb_host_init(gxio_usb_host_context_t * context, int usb_index,
+                       int is_ehci)
+{
+        char file[32];
+        int fd;
+
+        if (is_ehci)
+                snprintf(file, sizeof(file), "usb_host/%d/iorpc/ehci",
+                         usb_index);
+        else
+                snprintf(file, sizeof(file), "usb_host/%d/iorpc/ohci",
+                         usb_index);
+
+        fd = hv_dev_open((HV_VirtAddr) file, 0);
+        if (fd < 0) {
+                if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
+                        return fd;
+                else
+                        return -ENODEV;
+        }
+
+        context->fd = fd;
+
+        // Map in the MMIO space.
+        context->mmio_base =
+                (void __force *)iorpc_ioremap(fd, 0, HV_USB_HOST_MMIO_SIZE);
+
+        if (context->mmio_base == NULL) {
+                hv_dev_close(context->fd);
+                return -ENODEV;
+        }
+
+        return 0;
+}
+
+EXPORT_SYMBOL_GPL(gxio_usb_host_init);
+
+int gxio_usb_host_destroy(gxio_usb_host_context_t * context)
+{
+        iounmap((void __force __iomem *)(context->mmio_base));
+        hv_dev_close(context->fd);
+
+        context->mmio_base = NULL;
+        context->fd = -1;
+
+        return 0;
+}
+
+EXPORT_SYMBOL_GPL(gxio_usb_host_destroy);
+
+void *gxio_usb_host_get_reg_start(gxio_usb_host_context_t * context)
+{
+        return context->mmio_base;
+}
+
+EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_start);
+
+size_t gxio_usb_host_get_reg_len(gxio_usb_host_context_t * context)
+{
+        return HV_USB_HOST_MMIO_SIZE;
+}
+
+EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_len);