linux-libre/arch/tile/kernel/usb.c

/*
 * 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.
 *
 * Register the Tile-Gx USB interfaces as platform devices.
 *
 * The actual USB driver is just some glue (in
 * drivers/usb/host/[eo]hci-tilegx.c) which makes the registers available
 * to the standard kernel EHCI and OHCI drivers.
 */

#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/usb/tilegx.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>

static u64 ehci_dmamask = DMA_BIT_MASK(32);

#define USB_HOST_DEF(unit, type, dmamask) \
	static struct \
	    tilegx_usb_platform_data tilegx_usb_platform_data_ ## type ## \
		hci ## unit = { \
		.dev_index = unit, \
	}; \
	\
	static struct platform_device tilegx_usb_ ## type ## hci ## unit = { \
		.name		= "tilegx-" #type "hci", \
		.id		= unit, \
		.dev = { \
			.dma_mask		= dmamask, \
			.coherent_dma_mask	= DMA_BIT_MASK(32), \
			.platform_data = \
				&tilegx_usb_platform_data_ ## type ## hci ## \
				unit, \
		}, \
	};

USB_HOST_DEF(0, e, &ehci_dmamask)
USB_HOST_DEF(0, o, NULL)
USB_HOST_DEF(1, e, &ehci_dmamask)
USB_HOST_DEF(1, o, NULL)

#undef USB_HOST_DEF

static struct platform_device *tilegx_usb_devices[] __initdata = {
	&tilegx_usb_ehci0,
	&tilegx_usb_ehci1,
	&tilegx_usb_ohci0,
	&tilegx_usb_ohci1,
};

/** Add our set of possible USB devices. */
static int __init tilegx_usb_init(void)
{
	platform_add_devices(tilegx_usb_devices,
			     ARRAY_SIZE(tilegx_usb_devices));

	return 0;
}
arch_initcall(tilegx_usb_init);