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Diffstat (limited to 'arch/tile/gxio/usb_host.c')
-rw-r--r--arch/tile/gxio/usb_host.c91
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 00000000000..66b002f54ec
--- /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);