/******************************************************************************
*
* Copyright(c) 2003 - 2011 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-dev.h"
#include "iwl-debug.h"
#include "iwl-devtrace.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.
*
*/
static inline void _iwl_write8(struct iwl_priv *priv, u32 ofs, u8 val)
{
trace_iwlwifi_dev_iowrite8(priv, ofs, val);
iowrite8(val, priv->hw_base + ofs);
}
#ifdef CONFIG_IWLWIFI_DEBUG
static inline void __iwl_write8(const char *f, u32 l, struct iwl_priv *priv,
u32 ofs, u8 val)
{
IWL_DEBUG_IO(priv, "write8(0x%08X, 0x%02X) - %s %d\n", ofs, val, f, l);
_iwl_write8(priv, ofs, val);
}
#define iwl_write8(priv, ofs, val) \
__iwl_write8(__FILE__, __LINE__, priv, ofs, val)
#else
#define iwl_write8(priv, ofs, val) _iwl_write8(priv, ofs, val)
#endif
static inline void _iwl_write32(struct iwl_priv *priv, u32 ofs, u32 val)
{
trace_iwlwifi_dev_iowrite32(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
static inline u32 _iwl_read32(struct iwl_priv *priv, u32 ofs)
{
u32 val = ioread32(priv->hw_base + ofs);
trace_iwlwifi_dev_ioread32(priv, ofs, val);
return val;
}
#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);
}
static inline void iwl_set_bit(struct iwl_priv *p, u32 r, u32 m)
{
unsigned long reg_flags;
spin_lock_irqsave(&p->reg_lock, reg_flags);
__iwl_set_bit(__FILE__, __LINE__, p, r, m);
spin_unlock_irqrestore(&p->reg_lock, reg_flags);
}
#else
static inline void iwl_set_bit(struct iwl_priv *p, u32 r, u32 m)
{
unsigned long reg_flags;
spin_lock_irqsave(&p->reg_lock, reg_flags);
_iwl_set_bit(p, r, m);
spin_unlock_irqrestore(&p->reg_lock, reg_flags);
}
#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);
}
static inline void iwl_clear_bit(struct iwl_priv *p, u32 r, u32 m)
{
unsigned long reg_flags;
spin_lock_irqsave(&p->reg_lock, reg_flags);
__iwl_clear_bit(__FILE__, __LINE__, p, r, m);
spin_unlock_irqrestore(&p->reg_lock, reg_flags);
}
#else
static inline void iwl_clear_bit(struct iwl_priv *p, u32 r, u32 m)
{
unsigned long reg_flags;
spin_lock_irqsave(&p->reg_lock, reg_flags);
_iwl_clear_bit(p, r, m);
spin_unlock_irqrestore(&p->reg_lock, reg_flags);
}
#endif
static inline int _iwl_grab_nic_access(struct iwl_priv *priv)
{
int ret;
u32 val;
/* this bit wakes up the NIC */
_iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
/*
* These bits say the device is running, and should keep running for
* at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
* but they do not indicate that embedded SRAM is restored yet;
* 3945 and 4965 have volatile SRAM, and must save/restore contents
* to/from host DRAM when sleeping/waking for power-saving.
* Each direction takes approximately 1/4 millisecond; with this
* overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
* series of register accesses are expected (e.g. reading Event Log),
* to keep device from sleeping.
*
* CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
* SRAM is okay/restored. We don't check that here because this call
* is just for hardware register access; but GP1 MAC_SLEEP check is a
* good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
*
* 5000 series and later (including 1000 series) have non-volatile SRAM,
* and do not save/restore SRAM when power cycling.
*/
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);
_iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
return -EIO;
}
return 0;
}
#ifdef CONFIG_IWLWIFI_DEBUG
static inline int __iwl_grab_nic_access(const char *f, u32 l,
struct iwl_priv *priv)
{
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)
{
_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)
{
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);
IWL_DEBUG_IO(priv, "read_direct32(0x%4X) = 0x%08x - %s %d\n", reg, value,
f, l);
return value;
}
static inline u32 iwl_read_direct32(struct iwl_priv *priv, u32 reg)
{
u32 value;
unsigned long reg_flags;
spin_lock_irqsave(&priv->reg_lock, reg_flags);
iwl_grab_nic_access(priv);
value = __iwl_read_direct32(__FILE__, __LINE__, priv, reg);
iwl_release_nic_access(priv);
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
return value;
}
#else
static inline u32 iwl_read_direct32(struct iwl_priv *priv, u32 reg)
{
u32 value;
unsigned long reg_flags;
spin_lock_irqsave(&priv->reg_lock, reg_flags);
iwl_grab_nic_access(priv);
value = _iwl_read_direct32(priv, reg);
iwl_release_nic_access(priv);
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
return value;
}
#endif
static inline void _iwl_write_direct32(struct iwl_priv *priv,
u32 reg, u32 value)
{
_iwl_write32(priv, reg, value);
}
static inline void iwl_write_direct32(struct iwl_priv *priv, u32 reg, u32 value)
{
unsigned long reg_flags;
spin_lock_irqsave(&priv->reg_lock, reg_flags);
if (!iwl_grab_nic_access(priv)) {
_iwl_write_direct32(priv, reg, value);
iwl_release_nic_access(priv);
}
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
}
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)
{
int t = 0;
do {
if ((iwl_read_direct32(priv, addr) & mask) == 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_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);
}
static inline u32 iwl_read_prph(struct iwl_priv *priv, u32 reg)
{
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_release_nic_access(priv);
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
return val;
}
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);
}
static inline void iwl_write_prph(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_prph(priv, addr, val);
iwl_release_nic_access(priv);
}
spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
}
#define _iwl_set_bits_prph(priv, reg, mask) \
_iwl_write_prph(priv, reg, (_iwl_read_prph(priv, reg) | mask))
static inline void iwl_set_bits_prph(struct iwl_priv *priv, u32 reg, u32 mask)
{
unsigned long reg_flags;
spin_lock_irqsave(&priv->reg_lock, reg_flags);
iwl_grab_nic_access(priv);
_iwl_set_bits_prph(priv, reg, mask);
iwl_release_nic_access(priv);
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
