/******************************************************************************
*
- * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
+ * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved.
*
* Portions of this file are derived from the ipw3945 project.
*
#include <linux/io.h>
#include "iwl-debug.h"
+#include "iwl-devtrace.h"
/*
* IO, register, and NIC memory access functions
*
*/
-#define _iwl_write32(priv, ofs, val) iowrite32((val), (priv)->hw_base + (ofs))
+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)
#define iwl_write32(priv, ofs, val) _iwl_write32(priv, ofs, val)
#endif
-#define _iwl_read32(priv, ofs) ioread32((priv)->hw_base + (ofs))
+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, "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)
+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
-#define iwl_set_bit(p, r, m) _iwl_set_bit(p, r, m)
+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_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)
+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
-#define iwl_clear_bit(p, r, m) _iwl_clear_bit(p, r, m)
+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;
-#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);
+
+ /*
+ * 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 |
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;
}
-#ifdef CONFIG_IWLWIFI_DEBUG
- atomic_inc(&priv->restrict_refcnt);
-#endif
return 0;
}
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);
}
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);
+ _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);
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)
+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
-#define iwl_read_direct32 _iwl_read_direct32
+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,
{
_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)
+static inline void iwl_write_direct32(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);
+ 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);
}
-#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)
if ((priv != NULL) && (values != NULL)) {
for (; 0 < len; len -= count, reg += count, values++)
- _iwl_write_direct32(priv, reg, *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);
+ 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
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)
+static inline u32 iwl_read_prph(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);
-}
+ unsigned long reg_flags;
+ u32 val;
-#define iwl_read_prph(priv, reg) \
- __iwl_read_prph(__func__, __LINE__, priv, reg)
-#else
-#define iwl_read_prph _iwl_read_prph
-#endif
+ 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)
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)
+
+static inline void iwl_write_prph(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);
-}
+ unsigned long reg_flags;
-#define iwl_write_prph(priv, addr, val) \
- __iwl_write_prph(__func__, __LINE__, priv, addr, val);
-#else
-#define iwl_write_prph _iwl_write_prph
-#endif
+ 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))
-#ifdef CONFIG_IWLWIFI_DEBUG
-static inline void __iwl_set_bits_prph(const char *f, u32 line,
- struct iwl_priv *priv,
- u32 reg, u32 mask)
+
+static inline void iwl_set_bits_prph(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);
+ 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_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)
+static inline void iwl_set_bits_mask_prph(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);
+ 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);
}
-#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);
+ 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)
{
- iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, 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();
- return iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
+ 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)
{
- iwl_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
- wmb();
- iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, 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)
{
- 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);
+ 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
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