diff options
author | Stanislaw Gruszka <sgruszka@redhat.com> | 2011-12-23 07:13:43 (GMT) |
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committer | John W. Linville <linville@tuxdriver.com> | 2012-01-04 19:30:44 (GMT) |
commit | 17d4eca6432bb1d4753d7894b824271673a1640a (patch) | |
tree | c8ad71a2202b7ff618fe8dd5c38fec07c31980f1 /drivers/net/wireless/iwlegacy/common.c | |
parent | d71be937202853eda76562e9678073465d5c0fa8 (diff) | |
download | linux-fsl-qoriq-17d4eca6432bb1d4753d7894b824271673a1640a.tar.xz |
iwlegacy: move some i/o helpers out of inline
This save us about 20k of text size, and should have no impact on
performance as hot paths do not use much I/O.
Before:
text data bss dec hex filename
108512 1784 168 110464 1af80 drivers/net/wireless/iwlegacy/iwl3945.ko
165730 2164 156 168050 29072 drivers/net/wireless/iwlegacy/iwl4965.ko
91942 328 48 92318 1689e drivers/net/wireless/iwlegacy/iwlegacy.ko
After:
text data bss dec hex filename
95556 1784 168 97508 17ce4 drivers/net/wireless/iwlegacy/iwl3945.ko
154853 2164 156 157173 265f5 drivers/net/wireless/iwlegacy/iwl4965.ko
91634 328 48 92010 1676a drivers/net/wireless/iwlegacy/iwlegacy.ko
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/iwlegacy/common.c')
-rw-r--r-- | drivers/net/wireless/iwlegacy/common.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlegacy/common.c b/drivers/net/wireless/iwlegacy/common.c index 881ba04..36454d0 100644 --- a/drivers/net/wireless/iwlegacy/common.c +++ b/drivers/net/wireless/iwlegacy/common.c @@ -42,6 +42,167 @@ #include "common.h" +int +_il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout) +{ + const int interval = 10; /* microseconds */ + int t = 0; + + do { + if ((_il_rd(il, addr) & mask) == (bits & mask)) + return t; + udelay(interval); + t += interval; + } while (t < timeout); + + return -ETIMEDOUT; +} +EXPORT_SYMBOL(_il_poll_bit); + +void +il_set_bit(struct il_priv *p, u32 r, u32 m) +{ + unsigned long reg_flags; + + spin_lock_irqsave(&p->reg_lock, reg_flags); + _il_set_bit(p, r, m); + spin_unlock_irqrestore(&p->reg_lock, reg_flags); +} +EXPORT_SYMBOL(il_set_bit); + +void +il_clear_bit(struct il_priv *p, u32 r, u32 m) +{ + unsigned long reg_flags; + + spin_lock_irqsave(&p->reg_lock, reg_flags); + _il_clear_bit(p, r, m); + spin_unlock_irqrestore(&p->reg_lock, reg_flags); +} +EXPORT_SYMBOL(il_clear_bit); + +int +_il_grab_nic_access(struct il_priv *il) +{ + int ret; + u32 val; + + /* this bit wakes up the NIC */ + _il_set_bit(il, 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). + * + */ + ret = + _il_poll_bit(il, 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 = _il_rd(il, CSR_GP_CNTRL); + IL_ERR("MAC is in deep sleep!. CSR_GP_CNTRL = 0x%08X\n", val); + _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI); + return -EIO; + } + + return 0; +} +EXPORT_SYMBOL_GPL(_il_grab_nic_access); + +int +il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout) +{ + const int interval = 10; /* microseconds */ + int t = 0; + + do { + if ((il_rd(il, addr) & mask) == mask) + return t; + udelay(interval); + t += interval; + } while (t < timeout); + + return -ETIMEDOUT; +} +EXPORT_SYMBOL(il_poll_bit); + +u32 +il_rd_prph(struct il_priv *il, u32 reg) +{ + unsigned long reg_flags; + u32 val; + + spin_lock_irqsave(&il->reg_lock, reg_flags); + _il_grab_nic_access(il); + val = _il_rd_prph(il, reg); + _il_release_nic_access(il); + spin_unlock_irqrestore(&il->reg_lock, reg_flags); + return val; +} +EXPORT_SYMBOL(il_rd_prph); + +void +il_wr_prph(struct il_priv *il, u32 addr, u32 val) +{ + unsigned long reg_flags; + + spin_lock_irqsave(&il->reg_lock, reg_flags); + if (!_il_grab_nic_access(il)) { + _il_wr_prph(il, addr, val); + _il_release_nic_access(il); + } + spin_unlock_irqrestore(&il->reg_lock, reg_flags); +} +EXPORT_SYMBOL(il_wr_prph); + +u32 +il_read_targ_mem(struct il_priv *il, u32 addr) +{ + unsigned long reg_flags; + u32 value; + + spin_lock_irqsave(&il->reg_lock, reg_flags); + _il_grab_nic_access(il); + + _il_wr(il, HBUS_TARG_MEM_RADDR, addr); + rmb(); + value = _il_rd(il, HBUS_TARG_MEM_RDAT); + + _il_release_nic_access(il); + spin_unlock_irqrestore(&il->reg_lock, reg_flags); + return value; +} +EXPORT_SYMBOL(il_read_targ_mem); + +void +il_write_targ_mem(struct il_priv *il, u32 addr, u32 val) +{ + unsigned long reg_flags; + + spin_lock_irqsave(&il->reg_lock, reg_flags); + if (!_il_grab_nic_access(il)) { + _il_wr(il, HBUS_TARG_MEM_WADDR, addr); + wmb(); + _il_wr(il, HBUS_TARG_MEM_WDAT, val); + _il_release_nic_access(il); + } + spin_unlock_irqrestore(&il->reg_lock, reg_flags); +} +EXPORT_SYMBOL(il_write_targ_mem); + const char * il_get_cmd_string(u8 cmd) { |