diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-io.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-io.h | 498 |
1 files changed, 31 insertions, 467 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-io.h b/drivers/net/wireless/iwlwifi/iwl-io.h index 0203a3bbf872..869edc580ec6 100644 --- a/drivers/net/wireless/iwlwifi/iwl-io.h +++ b/drivers/net/wireless/iwlwifi/iwl-io.h @@ -1,6 +1,6 @@ /****************************************************************************** * - * Copyright(c) 2003 - 2010 Intel Corporation. All rights reserved. + * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. * * Portions of this file are derived from the ipw3945 project. * @@ -35,494 +35,58 @@ #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) +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) +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) +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)) +void iwl_set_bit(struct iwl_priv *priv, u32 reg, u32 mask); +void iwl_clear_bit(struct iwl_priv *priv, u32 reg, u32 mask); -static inline void iwl_set_bits_mask_prph(struct iwl_priv *priv, u32 reg, - u32 bits, u32 mask) -{ - unsigned long reg_flags; +int iwl_poll_bit(struct iwl_priv *priv, u32 addr, + u32 bits, u32 mask, int timeout); +int iwl_poll_direct_bit(struct iwl_priv *priv, u32 addr, u32 mask, + int timeout); - 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); -} +int iwl_grab_nic_access_silent(struct iwl_priv *priv); +int iwl_grab_nic_access(struct iwl_priv *priv); +void iwl_release_nic_access(struct iwl_priv *priv); -static inline void iwl_clear_bits_prph(struct iwl_priv - *priv, u32 reg, u32 mask) -{ - unsigned long reg_flags; - u32 val; +u32 iwl_read_direct32(struct iwl_priv *priv, u32 reg); +void iwl_write_direct32(struct iwl_priv *priv, u32 reg, u32 value); - 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); +u32 iwl_read_prph(struct iwl_priv *priv, u32 reg); +void iwl_write_prph(struct iwl_priv *priv, u32 addr, u32 val); +void iwl_set_bits_prph(struct iwl_priv *priv, u32 reg, u32 mask); +void iwl_set_bits_mask_prph(struct iwl_priv *priv, u32 reg, + u32 bits, u32 mask); +void iwl_clear_bits_prph(struct iwl_priv *priv, u32 reg, u32 mask); - _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, addr); - rmb(); - value = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); +void _iwl_read_targ_mem_words(struct iwl_priv *priv, u32 addr, + void *buf, int words); - iwl_release_nic_access(priv); - spin_unlock_irqrestore(&priv->reg_lock, reg_flags); - return value; -} +#define iwl_read_targ_mem_words(priv, addr, buf, bufsize) \ + do { \ + BUILD_BUG_ON((bufsize) % sizeof(u32)); \ + _iwl_read_targ_mem_words(priv, addr, buf, \ + (bufsize) / sizeof(u32));\ + } while (0) -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); -} +u32 iwl_read_targ_mem(struct iwl_priv *priv, u32 addr); +void iwl_write_targ_mem(struct iwl_priv *priv, u32 addr, u32 val); #endif |