diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-io.h')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-io.h | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-io.h b/drivers/net/wireless/iwlwifi/iwl-io.h new file mode 100644 index 00000000000..5bc3df432d2 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/iwl-io.h @@ -0,0 +1,429 @@ +/****************************************************************************** + * + * Copyright(c) 2003 - 2008 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: + * James P. Ketrenos <ipw2100-admin@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 misconfiguring 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) writel((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("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) readl((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("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 + +static inline int _iwl_poll_bit(struct iwl_priv *priv, u32 addr, + u32 bits, u32 mask, int timeout) +{ + int i = 0; + + do { + if ((_iwl_read32(priv, addr) & mask) == (bits & mask)) + return i; + mdelay(10); + i += 10; + } while (i < 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("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("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("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 gp_ctl; + +#ifdef CONFIG_IWLWIFI_DEBUG + if (atomic_read(&priv->restrict_refcnt)) + return 0; +#endif + if (test_bit(STATUS_RF_KILL_HW, &priv->status) || + test_bit(STATUS_RF_KILL_SW, &priv->status)) { + IWL_WARNING("WARNING: Requesting MAC access during RFKILL " + "wakes up NIC\n"); + + /* 10 msec allows time for NIC to complete its data save */ + gp_ctl = _iwl_read32(priv, CSR_GP_CNTRL); + if (gp_ctl & CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY) { + IWL_DEBUG_RF_KILL("Wait for complete power-down, " + "gpctl = 0x%08x\n", gp_ctl); + mdelay(10); + } else + IWL_DEBUG_RF_KILL("power-down complete, " + "gpctl = 0x%08x\n", gp_ctl); + } + + /* 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), 50); + if (ret < 0) { + IWL_ERROR("MAC is in deep sleep!\n"); + 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_ERROR("Grabbing access while already held %s %d.\n", f, l); + + IWL_DEBUG_IO("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_ERROR("Release unheld nic access at line %s %d.\n", f, l); + + IWL_DEBUG_IO("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_ERROR("Nic access not held from %s %d\n", f, l); + IWL_DEBUG_IO("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_ERROR("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) +{ + int i = 0; + + do { + if ((_iwl_read_direct32(priv, addr) & mask) == mask) + return i; + mdelay(10); + i += 10; + } while (i < 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("poll_direct_bit(0x%08X, 0x%08X) - " + "timedout - %s %d\n", addr, mask, f, l); + else + IWL_DEBUG_IO("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)); + 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_ERROR("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))); + _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_ERROR("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_ERROR("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_ERROR("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); + 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); + 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); + for (; 0 < len; len -= sizeof(u32), values++) + iwl_write_direct32(priv, HBUS_TARG_MEM_WDAT, *values); +} +#endif |