linux/drivers/net/wireless/iwlwifi/iwl-bus.h

/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
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 * General Public License for more details.
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 * along with this program; if not, write to the Free Software
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 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
 * All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *****************************************************************************/
#ifndef __iwl_bus_h__
#define __iwl_bus_h__

/*This file includes the declaration that are exported from the bus layer */

#include <linux/types.h>
#include <linux/spinlock.h>

struct iwl_shared;
struct iwl_bus;

/**
 * struct iwl_bus_ops - bus specific operations
 * @get_pm_support: must returns true if the bus can go to sleep
 * @apm_config: will be called during the config of the APM configuration
 * @set_drv_data: set the shared data pointer to the bus layer
 * @get_hw_id: prints the hw_id in the provided buffer
 * @write8: write a byte to register at offset ofs
 * @write32: write a dword to register at offset ofs
 * @wread32: read a dword at register at offset ofs
 */
struct iwl_bus_ops {
	bool (*get_pm_support)(struct iwl_bus *bus);
	void (*apm_config)(struct iwl_bus *bus);
	void (*set_drv_data)(struct iwl_bus *bus, struct iwl_shared *shrd);
	void (*get_hw_id)(struct iwl_bus *bus, char buf[], int buf_len);
	void (*write8)(struct iwl_bus *bus, u32 ofs, u8 val);
	void (*write32)(struct iwl_bus *bus, u32 ofs, u32 val);
	u32 (*read32)(struct iwl_bus *bus, u32 ofs);
};

/**
 * struct iwl_bus - bus common data
 * @dev - pointer to struct device * that represent the device
 * @ops - pointer to iwl_bus_ops
 * @shrd - pointer to iwl_shared which holds shared data from the upper layer
 * @irq - the irq number for the device
 * @reg_lock - protect hw register access
 */
struct iwl_bus {
	/* Common data to all buses */
	struct device *dev;
	const struct iwl_bus_ops *ops;
	struct iwl_shared *shrd;

	unsigned int irq;
	spinlock_t reg_lock;

	/* pointer to bus specific struct */
	/*Ensure that this pointer will always be aligned to sizeof pointer */
	char bus_specific[0] __attribute__((__aligned__(sizeof(void *))));
};

static inline bool bus_get_pm_support(struct iwl_bus *bus)
{
	return bus->ops->get_pm_support(bus);
}

static inline void bus_apm_config(struct iwl_bus *bus)
{
	bus->ops->apm_config(bus);
}

static inline void bus_set_drv_data(struct iwl_bus *bus,
				struct iwl_shared *shrd)
{
	bus->ops->set_drv_data(bus, shrd);
}

static inline void bus_get_hw_id(struct iwl_bus *bus, char buf[], int buf_len)
{
	bus->ops->get_hw_id(bus, buf, buf_len);
}

static inline void bus_write8(struct iwl_bus *bus, u32 ofs, u8 val)
{
	bus->ops->write8(bus, ofs, val);
}

static inline void bus_write32(struct iwl_bus *bus, u32 ofs, u32 val)
{
	bus->ops->write32(bus, ofs, val);
}

static inline u32 bus_read32(struct iwl_bus *bus, u32 ofs)
{
	return bus->ops->read32(bus, ofs);
}

int __must_check iwl_pci_register_driver(void);
void iwl_pci_unregister_driver(void);

#endif /* __iwl_bus_h__ */