drivers/net/wireless/iwlwifi/iwl-io.h - kernel/msm-4.9 - Gitiles

 /******************************************************************************
  *
  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
  *
  * Portions of this file are derived from the ipw3945 project.
  *
  * 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
  * published by the Free Software Foundation.
  *
  * 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.  See the GNU General Public License for
  * more details.
  *
  * You should have received a copy of the GNU General Public License along with
  * this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  *
  * The full GNU General Public License is included in this distribution in the
  * file called LICENSE.
  *
  * Contact Information:
  *  Intel Linux Wireless <ilw@linux.intel.com>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *
  *****************************************************************************/

 #ifndef __iwl_io_h__
 #define __iwl_io_h__

 #include <linux/io.h>

 #include "iwl-debug.h"

 /*
  * IO, register, and NIC memory access functions
  *
  * NOTE on naming convention and macro usage for these
  *
  * A single _ prefix before a an access function means that no state
  * check or debug information is printed when that function is called.
  *
  * A double __ prefix before an access function means that state is checked
  * and the current line number and caller function name are printed in addition
  * to any other debug output.
  *
  * The non-prefixed name is the #define that maps the caller into a
  * #define that provides the caller's name and __LINE__ to the double
  * prefix version.
  *
  * If you wish to call the function without any debug or state checking,
  * you should use the single _ prefix version (as is used by dependent IO
  * routines, for example _iwl_read_direct32 calls the non-check version of
  * _iwl_read32.)
  *
  * These declarations are *extremely* useful in quickly isolating code deltas
  * which result in misconfiguration of the hardware I/O.  In combination with
  * git-bisect and the IO debug level you can quickly determine the specific
  * commit which breaks the IO sequence to the hardware.
  *
  */

 #define _iwl_write32(priv, ofs, val) iowrite32((val), (priv)->hw_base + (ofs))
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline void __iwl_write32(const char *f, u32 l, struct iwl_priv *priv,
 				 u32 ofs, u32 val)
 {
 	IWL_DEBUG_IO(priv, "write32(0x%08X, 0x%08X) - %s %d\n", ofs, val, f, l);
 	_iwl_write32(priv, ofs, val);
 }
 #define iwl_write32(priv, ofs, val) \
 	__iwl_write32(__FILE__, __LINE__, priv, ofs, val)
 #else
 #define iwl_write32(priv, ofs, val) _iwl_write32(priv, ofs, val)
 #endif

 #define _iwl_read32(priv, ofs) ioread32((priv)->hw_base + (ofs))
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline u32 __iwl_read32(char *f, u32 l, struct iwl_priv *priv, u32 ofs)
 {
 	IWL_DEBUG_IO(priv, "read_direct32(0x%08X) - %s %d\n", ofs, f, l);
 	return _iwl_read32(priv, ofs);
 }
 #define iwl_read32(priv, ofs) __iwl_read32(__FILE__, __LINE__, priv, ofs)
 #else
 #define iwl_read32(p, o) _iwl_read32(p, o)
 #endif

 #define IWL_POLL_INTERVAL 10	/* microseconds */
 static inline int _iwl_poll_bit(struct iwl_priv *priv, u32 addr,
 				u32 bits, u32 mask, int timeout)
 {
 	int t = 0;

 	do {
 		if ((_iwl_read32(priv, addr) & mask) == (bits & mask))
 			return t;
 		udelay(IWL_POLL_INTERVAL);
 		t += IWL_POLL_INTERVAL;
 	} while (t < timeout);

 	return -ETIMEDOUT;
 }
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline int __iwl_poll_bit(const char *f, u32 l,
 				 struct iwl_priv *priv, u32 addr,
 				 u32 bits, u32 mask, int timeout)
 {
 	int ret = _iwl_poll_bit(priv, addr, bits, mask, timeout);
 	IWL_DEBUG_IO(priv, "poll_bit(0x%08X, 0x%08X, 0x%08X) - %s- %s %d\n",
 		     addr, bits, mask,
 		     unlikely(ret  == -ETIMEDOUT) ? "timeout" : "", f, l);
 	return ret;
 }
 #define iwl_poll_bit(priv, addr, bits, mask, timeout) \
 	__iwl_poll_bit(__FILE__, __LINE__, priv, addr, bits, mask, timeout)
 #else
 #define iwl_poll_bit(p, a, b, m, t) _iwl_poll_bit(p, a, b, m, t)
 #endif

 static inline void _iwl_set_bit(struct iwl_priv *priv, u32 reg, u32 mask)
 {
 	_iwl_write32(priv, reg, _iwl_read32(priv, reg) | mask);
 }
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline void __iwl_set_bit(const char *f, u32 l,
 				 struct iwl_priv *priv, u32 reg, u32 mask)
 {
 	u32 val = _iwl_read32(priv, reg) | mask;
 	IWL_DEBUG_IO(priv, "set_bit(0x%08X, 0x%08X) = 0x%08X\n", reg, mask, val);
 	_iwl_write32(priv, reg, val);
 }
 #define iwl_set_bit(p, r, m) __iwl_set_bit(__FILE__, __LINE__, p, r, m)
 #else
 #define iwl_set_bit(p, r, m) _iwl_set_bit(p, r, m)
 #endif

 static inline void _iwl_clear_bit(struct iwl_priv *priv, u32 reg, u32 mask)
 {
 	_iwl_write32(priv, reg, _iwl_read32(priv, reg) & ~mask);
 }
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline void __iwl_clear_bit(const char *f, u32 l,
 				   struct iwl_priv *priv, u32 reg, u32 mask)
 {
 	u32 val = _iwl_read32(priv, reg) & ~mask;
 	IWL_DEBUG_IO(priv, "clear_bit(0x%08X, 0x%08X) = 0x%08X\n", reg, mask, val);
 	_iwl_write32(priv, reg, val);
 }
 #define iwl_clear_bit(p, r, m) __iwl_clear_bit(__FILE__, __LINE__, p, r, m)
 #else
 #define iwl_clear_bit(p, r, m) _iwl_clear_bit(p, r, m)
 #endif

 static inline int _iwl_grab_nic_access(struct iwl_priv *priv)
 {
 	int ret;
 	u32 val;
 #ifdef CONFIG_IWLWIFI_DEBUG
 	if (atomic_read(&priv->restrict_refcnt))
 		return 0;
 #endif
 	/* this bit wakes up the NIC */
 	_iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
 	ret = _iwl_poll_bit(priv, CSR_GP_CNTRL,
 			   CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
 			   (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
 			    CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
 	if (ret < 0) {
 		val = _iwl_read32(priv, CSR_GP_CNTRL);
 		IWL_ERR(priv, "MAC is in deep sleep!.  CSR_GP_CNTRL = 0x%08X\n", val);
 		return -EIO;
 	}

 #ifdef CONFIG_IWLWIFI_DEBUG
 	atomic_inc(&priv->restrict_refcnt);
 #endif
 	return 0;
 }

 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline int __iwl_grab_nic_access(const char *f, u32 l,
 					       struct iwl_priv *priv)
 {
 	if (atomic_read(&priv->restrict_refcnt))
 		IWL_ERR(priv, "Grabbing access while already held %s %d.\n", f, l);

 	IWL_DEBUG_IO(priv, "grabbing nic access - %s %d\n", f, l);
 	return _iwl_grab_nic_access(priv);
 }
 #define iwl_grab_nic_access(priv) \
 	__iwl_grab_nic_access(__FILE__, __LINE__, priv)
 #else
 #define iwl_grab_nic_access(priv) \
 	_iwl_grab_nic_access(priv)
 #endif

 static inline void _iwl_release_nic_access(struct iwl_priv *priv)
 {
 #ifdef CONFIG_IWLWIFI_DEBUG
 	if (atomic_dec_and_test(&priv->restrict_refcnt))
 #endif
 		_iwl_clear_bit(priv, CSR_GP_CNTRL,
 			       CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
 }
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline void __iwl_release_nic_access(const char *f, u32 l,
 					    struct iwl_priv *priv)
 {
 	if (atomic_read(&priv->restrict_refcnt) <= 0)
 		IWL_ERR(priv, "Release unheld nic access at line %s %d.\n", f, l);

 	IWL_DEBUG_IO(priv, "releasing nic access - %s %d\n", f, l);
 	_iwl_release_nic_access(priv);
 }
 #define iwl_release_nic_access(priv) \
 	__iwl_release_nic_access(__FILE__, __LINE__, priv)
 #else
 #define iwl_release_nic_access(priv) \
 	_iwl_release_nic_access(priv)
 #endif

 static inline u32 _iwl_read_direct32(struct iwl_priv *priv, u32 reg)
 {
 	return _iwl_read32(priv, reg);
 }
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline u32 __iwl_read_direct32(const char *f, u32 l,
 					struct iwl_priv *priv, u32 reg)
 {
 	u32 value = _iwl_read_direct32(priv, reg);
 	if (!atomic_read(&priv->restrict_refcnt))
 		IWL_ERR(priv, "Nic access not held from %s %d\n", f, l);
 	IWL_DEBUG_IO(priv, "read_direct32(0x%4X) = 0x%08x - %s %d \n", reg, value,
 		     f, l);
 	return value;
 }
 #define iwl_read_direct32(priv, reg) \
 	__iwl_read_direct32(__FILE__, __LINE__, priv, reg)
 #else
 #define iwl_read_direct32 _iwl_read_direct32
 #endif

 static inline void _iwl_write_direct32(struct iwl_priv *priv,
 					 u32 reg, u32 value)
 {
 	_iwl_write32(priv, reg, value);
 }
 #ifdef CONFIG_IWLWIFI_DEBUG
 static void __iwl_write_direct32(const char *f , u32 line,
 				   struct iwl_priv *priv, u32 reg, u32 value)
 {
 	if (!atomic_read(&priv->restrict_refcnt))
 		IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
 	_iwl_write_direct32(priv, reg, value);
 }
 #define iwl_write_direct32(priv, reg, value) \
 	__iwl_write_direct32(__func__, __LINE__, priv, reg, value)
 #else
 #define iwl_write_direct32 _iwl_write_direct32
 #endif

 static inline void iwl_write_reg_buf(struct iwl_priv *priv,
 					       u32 reg, u32 len, u32 *values)
 {
 	u32 count = sizeof(u32);

 	if ((priv != NULL) && (values != NULL)) {
 		for (; 0 < len; len -= count, reg += count, values++)
 			_iwl_write_direct32(priv, reg, *values);
 	}
 }

 static inline int _iwl_poll_direct_bit(struct iwl_priv *priv, u32 addr,
 				       u32 mask, int timeout)
 {
 	return _iwl_poll_bit(priv, addr, mask, mask, timeout);
 }

 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline int __iwl_poll_direct_bit(const char *f, u32 l,
 					    struct iwl_priv *priv,
 					    u32 addr, u32 mask, int timeout)
 {
 	int ret  = _iwl_poll_direct_bit(priv, addr, mask, timeout);

 	if (unlikely(ret == -ETIMEDOUT))
 		IWL_DEBUG_IO(priv, "poll_direct_bit(0x%08X, 0x%08X) - "
 			     "timedout - %s %d\n", addr, mask, f, l);
 	else
 		IWL_DEBUG_IO(priv, "poll_direct_bit(0x%08X, 0x%08X) = 0x%08X "
 			     "- %s %d\n", addr, mask, ret, f, l);
 	return ret;
 }
 #define iwl_poll_direct_bit(priv, addr, mask, timeout) \
 	__iwl_poll_direct_bit(__FILE__, __LINE__, priv, addr, mask, timeout)
 #else
 #define iwl_poll_direct_bit _iwl_poll_direct_bit
 #endif

 static inline u32 _iwl_read_prph(struct iwl_priv *priv, u32 reg)
 {
 	_iwl_write_direct32(priv, HBUS_TARG_PRPH_RADDR, reg | (3 << 24));
 	rmb();
 	return _iwl_read_direct32(priv, HBUS_TARG_PRPH_RDAT);
 }
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline u32 __iwl_read_prph(const char *f, u32 line,
 				  struct iwl_priv *priv, u32 reg)
 {
 	if (!atomic_read(&priv->restrict_refcnt))
 		IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
 	return _iwl_read_prph(priv, reg);
 }

 #define iwl_read_prph(priv, reg) \
 	__iwl_read_prph(__func__, __LINE__, priv, reg)
 #else
 #define iwl_read_prph _iwl_read_prph
 #endif

 static inline void _iwl_write_prph(struct iwl_priv *priv,
 					     u32 addr, u32 val)
 {
 	_iwl_write_direct32(priv, HBUS_TARG_PRPH_WADDR,
 			      ((addr & 0x0000FFFF) | (3 << 24)));
 	wmb();
 	_iwl_write_direct32(priv, HBUS_TARG_PRPH_WDAT, val);
 }
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline void __iwl_write_prph(const char *f, u32 line,
 				    struct iwl_priv *priv, u32 addr, u32 val)
 {
 	if (!atomic_read(&priv->restrict_refcnt))
 		IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
 	_iwl_write_prph(priv, addr, val);
 }

 #define iwl_write_prph(priv, addr, val) \
 	__iwl_write_prph(__func__, __LINE__, priv, addr, val);
 #else
 #define iwl_write_prph _iwl_write_prph
 #endif

 #define _iwl_set_bits_prph(priv, reg, mask) \
 	_iwl_write_prph(priv, reg, (_iwl_read_prph(priv, reg) | mask))
 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline void __iwl_set_bits_prph(const char *f, u32 line,
 				       struct iwl_priv *priv,
 				       u32 reg, u32 mask)
 {
 	if (!atomic_read(&priv->restrict_refcnt))
 		IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);

 	_iwl_set_bits_prph(priv, reg, mask);
 }
 #define iwl_set_bits_prph(priv, reg, mask) \
 	__iwl_set_bits_prph(__func__, __LINE__, priv, reg, mask)
 #else
 #define iwl_set_bits_prph _iwl_set_bits_prph
 #endif

 #define _iwl_set_bits_mask_prph(priv, reg, bits, mask) \
 	_iwl_write_prph(priv, reg, ((_iwl_read_prph(priv, reg) & mask) | bits))

 #ifdef CONFIG_IWLWIFI_DEBUG
 static inline void __iwl_set_bits_mask_prph(const char *f, u32 line,
 		struct iwl_priv *priv, u32 reg, u32 bits, u32 mask)
 {
 	if (!atomic_read(&priv->restrict_refcnt))
 		IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
 	_iwl_set_bits_mask_prph(priv, reg, bits, mask);
 }
 #define iwl_set_bits_mask_prph(priv, reg, bits, mask) \
 	__iwl_set_bits_mask_prph(__func__, __LINE__, priv, reg, bits, mask)
 #else
 #define iwl_set_bits_mask_prph _iwl_set_bits_mask_prph
 #endif

 static inline void iwl_clear_bits_prph(struct iwl_priv
 						 *priv, u32 reg, u32 mask)
 {
 	u32 val = _iwl_read_prph(priv, reg);
 	_iwl_write_prph(priv, reg, (val & ~mask));
 }

 static inline u32 iwl_read_targ_mem(struct iwl_priv *priv, u32 addr)
 {
 	iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, addr);
 	rmb();
 	return iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 }

 static inline void iwl_write_targ_mem(struct iwl_priv *priv, u32 addr, u32 val)
 {
 	iwl_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
 	wmb();
 	iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, val);
 }

 static inline void iwl_write_targ_mem_buf(struct iwl_priv *priv, u32 addr,
 					  u32 len, u32 *values)
 {
 	iwl_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
 	wmb();
 	for (; 0 < len; len -= sizeof(u32), values++)
 		iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, *values);
 }
 #endif
	/******************************************************************************
	*
	* Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
	*
	* Portions of this file are derived from the ipw3945 project.
	*
	* 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
	* published by the Free Software Foundation.
	*
	* 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. See the GNU General Public License for
	* more details.
	*
	* You should have received a copy of the GNU General Public License along with
	* this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
	*
	* The full GNU General Public License is included in this distribution in the
	* file called LICENSE.
	*
	* Contact Information:
	* Intel Linux Wireless <ilw@linux.intel.com>
	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	*
	*****************************************************************************/

	#ifndef __iwl_io_h__
	#define __iwl_io_h__

	#include <linux/io.h>

	#include "iwl-debug.h"

	/*
	* IO, register, and NIC memory access functions
	*
	* NOTE on naming convention and macro usage for these
	*
	* A single _ prefix before a an access function means that no state
	* check or debug information is printed when that function is called.
	*
	* A double __ prefix before an access function means that state is checked
	* and the current line number and caller function name are printed in addition
	* to any other debug output.
	*
	* The non-prefixed name is the #define that maps the caller into a
	* #define that provides the caller's name and __LINE__ to the double
	* prefix version.
	*
	* If you wish to call the function without any debug or state checking,
	* you should use the single _ prefix version (as is used by dependent IO
	* routines, for example _iwl_read_direct32 calls the non-check version of
	* _iwl_read32.)
	*
	* These declarations are extremely useful in quickly isolating code deltas
	* which result in misconfiguration of the hardware I/O. In combination with
	* git-bisect and the IO debug level you can quickly determine the specific
	* commit which breaks the IO sequence to the hardware.
	*
	*/

	#define _iwl_write32(priv, ofs, val) iowrite32((val), (priv)->hw_base + (ofs))
	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline void __iwl_write32(const char f, u32 l, struct iwl_priv priv,
	u32 ofs, u32 val)
	{
	IWL_DEBUG_IO(priv, "write32(0x%08X, 0x%08X) - %s %d\n", ofs, val, f, l);
	_iwl_write32(priv, ofs, val);
	}
	#define iwl_write32(priv, ofs, val) \
	__iwl_write32(__FILE__, __LINE__, priv, ofs, val)
	#else
	#define iwl_write32(priv, ofs, val) _iwl_write32(priv, ofs, val)
	#endif

	#define _iwl_read32(priv, ofs) ioread32((priv)->hw_base + (ofs))
	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline u32 __iwl_read32(char f, u32 l, struct iwl_priv priv, u32 ofs)
	{
	IWL_DEBUG_IO(priv, "read_direct32(0x%08X) - %s %d\n", ofs, f, l);
	return _iwl_read32(priv, ofs);
	}
	#define iwl_read32(priv, ofs) __iwl_read32(__FILE__, __LINE__, priv, ofs)
	#else
	#define iwl_read32(p, o) _iwl_read32(p, o)
	#endif

	#define IWL_POLL_INTERVAL 10 /* microseconds */
	static inline int _iwl_poll_bit(struct iwl_priv *priv, u32 addr,
	u32 bits, u32 mask, int timeout)
	{
	int t = 0;

	do {
	if ((_iwl_read32(priv, addr) & mask) == (bits & mask))
	return t;
	udelay(IWL_POLL_INTERVAL);
	t += IWL_POLL_INTERVAL;
	} while (t < timeout);

	return -ETIMEDOUT;
	}
	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline int __iwl_poll_bit(const char *f, u32 l,
	struct iwl_priv *priv, u32 addr,
	u32 bits, u32 mask, int timeout)
	{
	int ret = _iwl_poll_bit(priv, addr, bits, mask, timeout);
	IWL_DEBUG_IO(priv, "poll_bit(0x%08X, 0x%08X, 0x%08X) - %s- %s %d\n",
	addr, bits, mask,
	unlikely(ret == -ETIMEDOUT) ? "timeout" : "", f, l);
	return ret;
	}
	#define iwl_poll_bit(priv, addr, bits, mask, timeout) \
	__iwl_poll_bit(__FILE__, __LINE__, priv, addr, bits, mask, timeout)
	#else
	#define iwl_poll_bit(p, a, b, m, t) _iwl_poll_bit(p, a, b, m, t)
	#endif

	static inline void _iwl_set_bit(struct iwl_priv *priv, u32 reg, u32 mask)
	{
	_iwl_write32(priv, reg, _iwl_read32(priv, reg) \| mask);
	}
	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline void __iwl_set_bit(const char *f, u32 l,
	struct iwl_priv *priv, u32 reg, u32 mask)
	{
	u32 val = _iwl_read32(priv, reg) \| mask;
	IWL_DEBUG_IO(priv, "set_bit(0x%08X, 0x%08X) = 0x%08X\n", reg, mask, val);
	_iwl_write32(priv, reg, val);
	}
	#define iwl_set_bit(p, r, m) __iwl_set_bit(__FILE__, __LINE__, p, r, m)
	#else
	#define iwl_set_bit(p, r, m) _iwl_set_bit(p, r, m)
	#endif

	static inline void _iwl_clear_bit(struct iwl_priv *priv, u32 reg, u32 mask)
	{
	_iwl_write32(priv, reg, _iwl_read32(priv, reg) & ~mask);
	}
	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline void __iwl_clear_bit(const char *f, u32 l,
	struct iwl_priv *priv, u32 reg, u32 mask)
	{
	u32 val = _iwl_read32(priv, reg) & ~mask;
	IWL_DEBUG_IO(priv, "clear_bit(0x%08X, 0x%08X) = 0x%08X\n", reg, mask, val);
	_iwl_write32(priv, reg, val);
	}
	#define iwl_clear_bit(p, r, m) __iwl_clear_bit(__FILE__, __LINE__, p, r, m)
	#else
	#define iwl_clear_bit(p, r, m) _iwl_clear_bit(p, r, m)
	#endif

	static inline int _iwl_grab_nic_access(struct iwl_priv *priv)
	{
	int ret;
	u32 val;
	#ifdef CONFIG_IWLWIFI_DEBUG
	if (atomic_read(&priv->restrict_refcnt))
	return 0;
	#endif
	/* this bit wakes up the NIC */
	_iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
	ret = _iwl_poll_bit(priv, CSR_GP_CNTRL,
	CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
	(CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY \|
	CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
	if (ret < 0) {
	val = _iwl_read32(priv, CSR_GP_CNTRL);
	IWL_ERR(priv, "MAC is in deep sleep!. CSR_GP_CNTRL = 0x%08X\n", val);
	return -EIO;
	}

	#ifdef CONFIG_IWLWIFI_DEBUG
	atomic_inc(&priv->restrict_refcnt);
	#endif
	return 0;
	}

	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline int __iwl_grab_nic_access(const char *f, u32 l,
	struct iwl_priv *priv)
	{
	if (atomic_read(&priv->restrict_refcnt))
	IWL_ERR(priv, "Grabbing access while already held %s %d.\n", f, l);

	IWL_DEBUG_IO(priv, "grabbing nic access - %s %d\n", f, l);
	return _iwl_grab_nic_access(priv);
	}
	#define iwl_grab_nic_access(priv) \
	__iwl_grab_nic_access(__FILE__, __LINE__, priv)
	#else
	#define iwl_grab_nic_access(priv) \
	_iwl_grab_nic_access(priv)
	#endif

	static inline void _iwl_release_nic_access(struct iwl_priv *priv)
	{
	#ifdef CONFIG_IWLWIFI_DEBUG
	if (atomic_dec_and_test(&priv->restrict_refcnt))
	#endif
	_iwl_clear_bit(priv, CSR_GP_CNTRL,
	CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
	}
	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline void __iwl_release_nic_access(const char *f, u32 l,
	struct iwl_priv *priv)
	{
	if (atomic_read(&priv->restrict_refcnt) <= 0)
	IWL_ERR(priv, "Release unheld nic access at line %s %d.\n", f, l);

	IWL_DEBUG_IO(priv, "releasing nic access - %s %d\n", f, l);
	_iwl_release_nic_access(priv);
	}
	#define iwl_release_nic_access(priv) \
	__iwl_release_nic_access(__FILE__, __LINE__, priv)
	#else
	#define iwl_release_nic_access(priv) \
	_iwl_release_nic_access(priv)
	#endif

	static inline u32 _iwl_read_direct32(struct iwl_priv *priv, u32 reg)
	{
	return _iwl_read32(priv, reg);
	}
	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline u32 __iwl_read_direct32(const char *f, u32 l,
	struct iwl_priv *priv, u32 reg)
	{
	u32 value = _iwl_read_direct32(priv, reg);
	if (!atomic_read(&priv->restrict_refcnt))
	IWL_ERR(priv, "Nic access not held from %s %d\n", f, l);
	IWL_DEBUG_IO(priv, "read_direct32(0x%4X) = 0x%08x - %s %d \n", reg, value,
	f, l);
	return value;
	}
	#define iwl_read_direct32(priv, reg) \
	__iwl_read_direct32(__FILE__, __LINE__, priv, reg)
	#else
	#define iwl_read_direct32 _iwl_read_direct32
	#endif

	static inline void _iwl_write_direct32(struct iwl_priv *priv,
	u32 reg, u32 value)
	{
	_iwl_write32(priv, reg, value);
	}
	#ifdef CONFIG_IWLWIFI_DEBUG
	static void __iwl_write_direct32(const char *f , u32 line,
	struct iwl_priv *priv, u32 reg, u32 value)
	{
	if (!atomic_read(&priv->restrict_refcnt))
	IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
	_iwl_write_direct32(priv, reg, value);
	}
	#define iwl_write_direct32(priv, reg, value) \
	__iwl_write_direct32(__func__, __LINE__, priv, reg, value)
	#else
	#define iwl_write_direct32 _iwl_write_direct32
	#endif

	static inline void iwl_write_reg_buf(struct iwl_priv *priv,
	u32 reg, u32 len, u32 *values)
	{
	u32 count = sizeof(u32);

	if ((priv != NULL) && (values != NULL)) {
	for (; 0 < len; len -= count, reg += count, values++)
	_iwl_write_direct32(priv, reg, *values);
	}
	}

	static inline int _iwl_poll_direct_bit(struct iwl_priv *priv, u32 addr,
	u32 mask, int timeout)
	{
	return _iwl_poll_bit(priv, addr, mask, mask, timeout);
	}

	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline int __iwl_poll_direct_bit(const char *f, u32 l,
	struct iwl_priv *priv,
	u32 addr, u32 mask, int timeout)
	{
	int ret = _iwl_poll_direct_bit(priv, addr, mask, timeout);

	if (unlikely(ret == -ETIMEDOUT))
	IWL_DEBUG_IO(priv, "poll_direct_bit(0x%08X, 0x%08X) - "
	"timedout - %s %d\n", addr, mask, f, l);
	else
	IWL_DEBUG_IO(priv, "poll_direct_bit(0x%08X, 0x%08X) = 0x%08X "
	"- %s %d\n", addr, mask, ret, f, l);
	return ret;
	}
	#define iwl_poll_direct_bit(priv, addr, mask, timeout) \
	__iwl_poll_direct_bit(__FILE__, __LINE__, priv, addr, mask, timeout)
	#else
	#define iwl_poll_direct_bit _iwl_poll_direct_bit
	#endif

	static inline u32 _iwl_read_prph(struct iwl_priv *priv, u32 reg)
	{
	_iwl_write_direct32(priv, HBUS_TARG_PRPH_RADDR, reg \| (3 << 24));
	rmb();
	return _iwl_read_direct32(priv, HBUS_TARG_PRPH_RDAT);
	}
	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline u32 __iwl_read_prph(const char *f, u32 line,
	struct iwl_priv *priv, u32 reg)
	{
	if (!atomic_read(&priv->restrict_refcnt))
	IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
	return _iwl_read_prph(priv, reg);
	}

	#define iwl_read_prph(priv, reg) \
	__iwl_read_prph(__func__, __LINE__, priv, reg)
	#else
	#define iwl_read_prph _iwl_read_prph
	#endif

	static inline void _iwl_write_prph(struct iwl_priv *priv,
	u32 addr, u32 val)
	{
	_iwl_write_direct32(priv, HBUS_TARG_PRPH_WADDR,
	((addr & 0x0000FFFF) \| (3 << 24)));
	wmb();
	_iwl_write_direct32(priv, HBUS_TARG_PRPH_WDAT, val);
	}
	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline void __iwl_write_prph(const char *f, u32 line,
	struct iwl_priv *priv, u32 addr, u32 val)
	{
	if (!atomic_read(&priv->restrict_refcnt))
	IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
	_iwl_write_prph(priv, addr, val);
	}

	#define iwl_write_prph(priv, addr, val) \
	__iwl_write_prph(__func__, __LINE__, priv, addr, val);
	#else
	#define iwl_write_prph _iwl_write_prph
	#endif

	#define _iwl_set_bits_prph(priv, reg, mask) \
	_iwl_write_prph(priv, reg, (_iwl_read_prph(priv, reg) \| mask))
	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline void __iwl_set_bits_prph(const char *f, u32 line,
	struct iwl_priv *priv,
	u32 reg, u32 mask)
	{
	if (!atomic_read(&priv->restrict_refcnt))
	IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);

	_iwl_set_bits_prph(priv, reg, mask);
	}
	#define iwl_set_bits_prph(priv, reg, mask) \
	__iwl_set_bits_prph(__func__, __LINE__, priv, reg, mask)
	#else
	#define iwl_set_bits_prph _iwl_set_bits_prph
	#endif

	#define _iwl_set_bits_mask_prph(priv, reg, bits, mask) \
	_iwl_write_prph(priv, reg, ((_iwl_read_prph(priv, reg) & mask) \| bits))

	#ifdef CONFIG_IWLWIFI_DEBUG
	static inline void __iwl_set_bits_mask_prph(const char *f, u32 line,
	struct iwl_priv *priv, u32 reg, u32 bits, u32 mask)
	{
	if (!atomic_read(&priv->restrict_refcnt))
	IWL_ERR(priv, "Nic access not held from %s line %d\n", f, line);
	_iwl_set_bits_mask_prph(priv, reg, bits, mask);
	}
	#define iwl_set_bits_mask_prph(priv, reg, bits, mask) \
	__iwl_set_bits_mask_prph(__func__, __LINE__, priv, reg, bits, mask)
	#else
	#define iwl_set_bits_mask_prph _iwl_set_bits_mask_prph
	#endif

	static inline void iwl_clear_bits_prph(struct iwl_priv
	*priv, u32 reg, u32 mask)
	{
	u32 val = _iwl_read_prph(priv, reg);
	_iwl_write_prph(priv, reg, (val & ~mask));
	}

	static inline u32 iwl_read_targ_mem(struct iwl_priv *priv, u32 addr)
	{
	iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, addr);
	rmb();
	return iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
	}

	static inline void iwl_write_targ_mem(struct iwl_priv *priv, u32 addr, u32 val)
	{
	iwl_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
	wmb();
	iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, val);
	}

	static inline void iwl_write_targ_mem_buf(struct iwl_priv *priv, u32 addr,
	u32 len, u32 *values)
	{
	iwl_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
	wmb();
	for (; 0 < len; len -= sizeof(u32), values++)
	iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, *values);
	}
	#endif