usb_host.rar_V2

/* * 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);