528 lines
15 KiB
C
528 lines
15 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
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*
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* Portions of this file are derived from the ipw3945 project.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*****************************************************************************/
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#ifndef __iwl_io_h__
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#define __iwl_io_h__
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#include <linux/io.h>
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#include "iwl-debug.h"
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#include "iwl-devtrace.h"
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/*
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* IO, register, and NIC memory access functions
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*
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* NOTE on naming convention and macro usage for these
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*
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* A single _ prefix before a an access function means that no state
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* check or debug information is printed when that function is called.
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*
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* A double __ prefix before an access function means that state is checked
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* and the current line number and caller function name are printed in addition
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* to any other debug output.
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*
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* The non-prefixed name is the #define that maps the caller into a
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* #define that provides the caller's name and __LINE__ to the double
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* prefix version.
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*
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* If you wish to call the function without any debug or state checking,
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* you should use the single _ prefix version (as is used by dependent IO
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* routines, for example _iwl_read_direct32 calls the non-check version of
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* _iwl_read32.)
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*
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* These declarations are *extremely* useful in quickly isolating code deltas
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* which result in misconfiguration of the hardware I/O. In combination with
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* git-bisect and the IO debug level you can quickly determine the specific
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* commit which breaks the IO sequence to the hardware.
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*
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*/
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static inline void _iwl_write8(struct iwl_priv *priv, u32 ofs, u8 val)
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{
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trace_iwlwifi_dev_iowrite8(priv, ofs, val);
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iowrite8(val, priv->hw_base + ofs);
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}
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#ifdef CONFIG_IWLWIFI_DEBUG
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static inline void __iwl_write8(const char *f, u32 l, struct iwl_priv *priv,
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u32 ofs, u8 val)
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{
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IWL_DEBUG_IO(priv, "write8(0x%08X, 0x%02X) - %s %d\n", ofs, val, f, l);
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_iwl_write8(priv, ofs, val);
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}
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#define iwl_write8(priv, ofs, val) \
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__iwl_write8(__FILE__, __LINE__, priv, ofs, val)
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#else
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#define iwl_write8(priv, ofs, val) _iwl_write8(priv, ofs, val)
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#endif
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static inline void _iwl_write32(struct iwl_priv *priv, u32 ofs, u32 val)
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{
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trace_iwlwifi_dev_iowrite32(priv, ofs, val);
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iowrite32(val, priv->hw_base + ofs);
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}
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#ifdef CONFIG_IWLWIFI_DEBUG
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static inline void __iwl_write32(const char *f, u32 l, struct iwl_priv *priv,
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u32 ofs, u32 val)
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{
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IWL_DEBUG_IO(priv, "write32(0x%08X, 0x%08X) - %s %d\n", ofs, val, f, l);
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_iwl_write32(priv, ofs, val);
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}
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#define iwl_write32(priv, ofs, val) \
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__iwl_write32(__FILE__, __LINE__, priv, ofs, val)
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#else
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#define iwl_write32(priv, ofs, val) _iwl_write32(priv, ofs, val)
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#endif
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static inline u32 _iwl_read32(struct iwl_priv *priv, u32 ofs)
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{
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u32 val = ioread32(priv->hw_base + ofs);
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trace_iwlwifi_dev_ioread32(priv, ofs, val);
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return val;
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}
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#ifdef CONFIG_IWLWIFI_DEBUG
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static inline u32 __iwl_read32(char *f, u32 l, struct iwl_priv *priv, u32 ofs)
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{
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IWL_DEBUG_IO(priv, "read_direct32(0x%08X) - %s %d\n", ofs, f, l);
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return _iwl_read32(priv, ofs);
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}
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#define iwl_read32(priv, ofs) __iwl_read32(__FILE__, __LINE__, priv, ofs)
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#else
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#define iwl_read32(p, o) _iwl_read32(p, o)
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#endif
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#define IWL_POLL_INTERVAL 10 /* microseconds */
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static inline int _iwl_poll_bit(struct iwl_priv *priv, u32 addr,
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u32 bits, u32 mask, int timeout)
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{
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int t = 0;
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do {
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if ((_iwl_read32(priv, addr) & mask) == (bits & mask))
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return t;
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udelay(IWL_POLL_INTERVAL);
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t += IWL_POLL_INTERVAL;
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} while (t < timeout);
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return -ETIMEDOUT;
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}
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#ifdef CONFIG_IWLWIFI_DEBUG
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static inline int __iwl_poll_bit(const char *f, u32 l,
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struct iwl_priv *priv, u32 addr,
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u32 bits, u32 mask, int timeout)
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{
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int ret = _iwl_poll_bit(priv, addr, bits, mask, timeout);
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IWL_DEBUG_IO(priv, "poll_bit(0x%08X, 0x%08X, 0x%08X) - %s- %s %d\n",
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addr, bits, mask,
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unlikely(ret == -ETIMEDOUT) ? "timeout" : "", f, l);
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return ret;
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}
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#define iwl_poll_bit(priv, addr, bits, mask, timeout) \
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__iwl_poll_bit(__FILE__, __LINE__, priv, addr, bits, mask, timeout)
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#else
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#define iwl_poll_bit(p, a, b, m, t) _iwl_poll_bit(p, a, b, m, t)
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#endif
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static inline void _iwl_set_bit(struct iwl_priv *priv, u32 reg, u32 mask)
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{
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_iwl_write32(priv, reg, _iwl_read32(priv, reg) | mask);
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}
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#ifdef CONFIG_IWLWIFI_DEBUG
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static inline void __iwl_set_bit(const char *f, u32 l,
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struct iwl_priv *priv, u32 reg, u32 mask)
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{
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u32 val = _iwl_read32(priv, reg) | mask;
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IWL_DEBUG_IO(priv, "set_bit(0x%08X, 0x%08X) = 0x%08X\n", reg, mask, val);
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_iwl_write32(priv, reg, val);
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}
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static inline void iwl_set_bit(struct iwl_priv *p, u32 r, u32 m)
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{
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unsigned long reg_flags;
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spin_lock_irqsave(&p->reg_lock, reg_flags);
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__iwl_set_bit(__FILE__, __LINE__, p, r, m);
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spin_unlock_irqrestore(&p->reg_lock, reg_flags);
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}
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#else
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static inline void iwl_set_bit(struct iwl_priv *p, u32 r, u32 m)
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{
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unsigned long reg_flags;
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spin_lock_irqsave(&p->reg_lock, reg_flags);
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_iwl_set_bit(p, r, m);
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spin_unlock_irqrestore(&p->reg_lock, reg_flags);
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}
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#endif
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static inline void _iwl_clear_bit(struct iwl_priv *priv, u32 reg, u32 mask)
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{
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_iwl_write32(priv, reg, _iwl_read32(priv, reg) & ~mask);
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}
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#ifdef CONFIG_IWLWIFI_DEBUG
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static inline void __iwl_clear_bit(const char *f, u32 l,
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struct iwl_priv *priv, u32 reg, u32 mask)
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{
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u32 val = _iwl_read32(priv, reg) & ~mask;
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IWL_DEBUG_IO(priv, "clear_bit(0x%08X, 0x%08X) = 0x%08X\n", reg, mask, val);
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_iwl_write32(priv, reg, val);
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}
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static inline void iwl_clear_bit(struct iwl_priv *p, u32 r, u32 m)
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{
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unsigned long reg_flags;
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spin_lock_irqsave(&p->reg_lock, reg_flags);
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__iwl_clear_bit(__FILE__, __LINE__, p, r, m);
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spin_unlock_irqrestore(&p->reg_lock, reg_flags);
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}
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#else
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static inline void iwl_clear_bit(struct iwl_priv *p, u32 r, u32 m)
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{
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unsigned long reg_flags;
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spin_lock_irqsave(&p->reg_lock, reg_flags);
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_iwl_clear_bit(p, r, m);
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spin_unlock_irqrestore(&p->reg_lock, reg_flags);
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}
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#endif
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static inline int _iwl_grab_nic_access(struct iwl_priv *priv)
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{
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int ret;
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u32 val;
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/* this bit wakes up the NIC */
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_iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
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/*
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* These bits say the device is running, and should keep running for
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* at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
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* but they do not indicate that embedded SRAM is restored yet;
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* 3945 and 4965 have volatile SRAM, and must save/restore contents
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* to/from host DRAM when sleeping/waking for power-saving.
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* Each direction takes approximately 1/4 millisecond; with this
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* overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
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* series of register accesses are expected (e.g. reading Event Log),
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* to keep device from sleeping.
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*
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* CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
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* SRAM is okay/restored. We don't check that here because this call
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* is just for hardware register access; but GP1 MAC_SLEEP check is a
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* good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
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*
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* 5000 series and later (including 1000 series) have non-volatile SRAM,
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* and do not save/restore SRAM when power cycling.
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*/
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ret = _iwl_poll_bit(priv, CSR_GP_CNTRL,
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CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
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(CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
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CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
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if (ret < 0) {
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val = _iwl_read32(priv, CSR_GP_CNTRL);
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IWL_ERR(priv, "MAC is in deep sleep!. CSR_GP_CNTRL = 0x%08X\n", val);
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_iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
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return -EIO;
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}
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return 0;
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}
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#ifdef CONFIG_IWLWIFI_DEBUG
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static inline int __iwl_grab_nic_access(const char *f, u32 l,
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struct iwl_priv *priv)
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{
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IWL_DEBUG_IO(priv, "grabbing nic access - %s %d\n", f, l);
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return _iwl_grab_nic_access(priv);
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}
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#define iwl_grab_nic_access(priv) \
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__iwl_grab_nic_access(__FILE__, __LINE__, priv)
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#else
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#define iwl_grab_nic_access(priv) \
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_iwl_grab_nic_access(priv)
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#endif
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static inline void _iwl_release_nic_access(struct iwl_priv *priv)
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{
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_iwl_clear_bit(priv, CSR_GP_CNTRL,
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CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
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}
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#ifdef CONFIG_IWLWIFI_DEBUG
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static inline void __iwl_release_nic_access(const char *f, u32 l,
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struct iwl_priv *priv)
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{
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IWL_DEBUG_IO(priv, "releasing nic access - %s %d\n", f, l);
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_iwl_release_nic_access(priv);
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}
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#define iwl_release_nic_access(priv) \
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__iwl_release_nic_access(__FILE__, __LINE__, priv)
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#else
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#define iwl_release_nic_access(priv) \
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_iwl_release_nic_access(priv)
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#endif
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static inline u32 _iwl_read_direct32(struct iwl_priv *priv, u32 reg)
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{
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return _iwl_read32(priv, reg);
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}
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#ifdef CONFIG_IWLWIFI_DEBUG
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static inline u32 __iwl_read_direct32(const char *f, u32 l,
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struct iwl_priv *priv, u32 reg)
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{
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u32 value = _iwl_read_direct32(priv, reg);
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IWL_DEBUG_IO(priv, "read_direct32(0x%4X) = 0x%08x - %s %d \n", reg, value,
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f, l);
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return value;
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}
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static inline u32 iwl_read_direct32(struct iwl_priv *priv, u32 reg)
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{
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u32 value;
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unsigned long reg_flags;
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spin_lock_irqsave(&priv->reg_lock, reg_flags);
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iwl_grab_nic_access(priv);
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value = __iwl_read_direct32(__FILE__, __LINE__, priv, reg);
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iwl_release_nic_access(priv);
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spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
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return value;
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}
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#else
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static inline u32 iwl_read_direct32(struct iwl_priv *priv, u32 reg)
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{
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u32 value;
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unsigned long reg_flags;
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spin_lock_irqsave(&priv->reg_lock, reg_flags);
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iwl_grab_nic_access(priv);
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value = _iwl_read_direct32(priv, reg);
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iwl_release_nic_access(priv);
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spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
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return value;
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}
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#endif
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static inline void _iwl_write_direct32(struct iwl_priv *priv,
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u32 reg, u32 value)
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{
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_iwl_write32(priv, reg, value);
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}
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static inline void iwl_write_direct32(struct iwl_priv *priv, u32 reg, u32 value)
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{
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unsigned long reg_flags;
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spin_lock_irqsave(&priv->reg_lock, reg_flags);
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if (!iwl_grab_nic_access(priv)) {
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_iwl_write_direct32(priv, reg, value);
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iwl_release_nic_access(priv);
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}
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spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
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}
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static inline void iwl_write_reg_buf(struct iwl_priv *priv,
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u32 reg, u32 len, u32 *values)
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{
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u32 count = sizeof(u32);
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if ((priv != NULL) && (values != NULL)) {
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for (; 0 < len; len -= count, reg += count, values++)
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iwl_write_direct32(priv, reg, *values);
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}
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}
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static inline int _iwl_poll_direct_bit(struct iwl_priv *priv, u32 addr,
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u32 mask, int timeout)
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{
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int t = 0;
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do {
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if ((iwl_read_direct32(priv, addr) & mask) == mask)
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return t;
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udelay(IWL_POLL_INTERVAL);
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t += IWL_POLL_INTERVAL;
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} while (t < timeout);
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return -ETIMEDOUT;
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}
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#ifdef CONFIG_IWLWIFI_DEBUG
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static inline int __iwl_poll_direct_bit(const char *f, u32 l,
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struct iwl_priv *priv,
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u32 addr, u32 mask, int timeout)
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{
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int ret = _iwl_poll_direct_bit(priv, addr, mask, timeout);
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if (unlikely(ret == -ETIMEDOUT))
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IWL_DEBUG_IO(priv, "poll_direct_bit(0x%08X, 0x%08X) - "
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"timedout - %s %d\n", addr, mask, f, l);
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else
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IWL_DEBUG_IO(priv, "poll_direct_bit(0x%08X, 0x%08X) = 0x%08X "
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"- %s %d\n", addr, mask, ret, f, l);
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return ret;
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}
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#define iwl_poll_direct_bit(priv, addr, mask, timeout) \
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__iwl_poll_direct_bit(__FILE__, __LINE__, priv, addr, mask, timeout)
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#else
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#define iwl_poll_direct_bit _iwl_poll_direct_bit
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#endif
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static inline u32 _iwl_read_prph(struct iwl_priv *priv, u32 reg)
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{
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_iwl_write_direct32(priv, HBUS_TARG_PRPH_RADDR, reg | (3 << 24));
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rmb();
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return _iwl_read_direct32(priv, HBUS_TARG_PRPH_RDAT);
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}
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static inline u32 iwl_read_prph(struct iwl_priv *priv, u32 reg)
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{
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unsigned long reg_flags;
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u32 val;
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spin_lock_irqsave(&priv->reg_lock, reg_flags);
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iwl_grab_nic_access(priv);
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val = _iwl_read_prph(priv, reg);
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iwl_release_nic_access(priv);
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spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
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return val;
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}
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static inline void _iwl_write_prph(struct iwl_priv *priv,
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u32 addr, u32 val)
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{
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_iwl_write_direct32(priv, HBUS_TARG_PRPH_WADDR,
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((addr & 0x0000FFFF) | (3 << 24)));
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wmb();
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_iwl_write_direct32(priv, HBUS_TARG_PRPH_WDAT, val);
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}
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static inline void iwl_write_prph(struct iwl_priv *priv, u32 addr, u32 val)
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{
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unsigned long reg_flags;
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spin_lock_irqsave(&priv->reg_lock, reg_flags);
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if (!iwl_grab_nic_access(priv)) {
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_iwl_write_prph(priv, addr, val);
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iwl_release_nic_access(priv);
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}
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spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
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}
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#define _iwl_set_bits_prph(priv, reg, mask) \
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_iwl_write_prph(priv, reg, (_iwl_read_prph(priv, reg) | mask))
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static inline void iwl_set_bits_prph(struct iwl_priv *priv, u32 reg, u32 mask)
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{
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unsigned long reg_flags;
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spin_lock_irqsave(&priv->reg_lock, reg_flags);
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iwl_grab_nic_access(priv);
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_iwl_set_bits_prph(priv, reg, mask);
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iwl_release_nic_access(priv);
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spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
|
|
}
|
|
|
|
#define _iwl_set_bits_mask_prph(priv, reg, bits, mask) \
|
|
_iwl_write_prph(priv, reg, ((_iwl_read_prph(priv, reg) & mask) | bits))
|
|
|
|
static inline void iwl_set_bits_mask_prph(struct iwl_priv *priv, u32 reg,
|
|
u32 bits, u32 mask)
|
|
{
|
|
unsigned long reg_flags;
|
|
|
|
spin_lock_irqsave(&priv->reg_lock, reg_flags);
|
|
iwl_grab_nic_access(priv);
|
|
_iwl_set_bits_mask_prph(priv, reg, bits, mask);
|
|
iwl_release_nic_access(priv);
|
|
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
|
|
}
|
|
|
|
static inline void iwl_clear_bits_prph(struct iwl_priv
|
|
*priv, u32 reg, u32 mask)
|
|
{
|
|
unsigned long reg_flags;
|
|
u32 val;
|
|
|
|
spin_lock_irqsave(&priv->reg_lock, reg_flags);
|
|
iwl_grab_nic_access(priv);
|
|
val = _iwl_read_prph(priv, reg);
|
|
_iwl_write_prph(priv, reg, (val & ~mask));
|
|
iwl_release_nic_access(priv);
|
|
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
|
|
}
|
|
|
|
static inline u32 iwl_read_targ_mem(struct iwl_priv *priv, u32 addr)
|
|
{
|
|
unsigned long reg_flags;
|
|
u32 value;
|
|
|
|
spin_lock_irqsave(&priv->reg_lock, reg_flags);
|
|
iwl_grab_nic_access(priv);
|
|
|
|
_iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, addr);
|
|
rmb();
|
|
value = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
|
|
|
|
iwl_release_nic_access(priv);
|
|
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
|
|
return value;
|
|
}
|
|
|
|
static inline void iwl_write_targ_mem(struct iwl_priv *priv, u32 addr, u32 val)
|
|
{
|
|
unsigned long reg_flags;
|
|
|
|
spin_lock_irqsave(&priv->reg_lock, reg_flags);
|
|
if (!iwl_grab_nic_access(priv)) {
|
|
_iwl_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
|
|
wmb();
|
|
_iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, val);
|
|
iwl_release_nic_access(priv);
|
|
}
|
|
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
|
|
}
|
|
|
|
static inline void iwl_write_targ_mem_buf(struct iwl_priv *priv, u32 addr,
|
|
u32 len, u32 *values)
|
|
{
|
|
unsigned long reg_flags;
|
|
|
|
spin_lock_irqsave(&priv->reg_lock, reg_flags);
|
|
if (!iwl_grab_nic_access(priv)) {
|
|
_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);
|
|
|
|
iwl_release_nic_access(priv);
|
|
}
|
|
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
|
|
}
|
|
#endif
|