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authorStanislaw Gruszka <sgruszka@redhat.com>2011-12-23 08:13:43 +0100
committerJohn W. Linville <linville@tuxdriver.com>2012-01-04 14:30:44 -0500
commit17d4eca6432bb1d4753d7894b824271673a1640a (patch)
treec8ad71a2202b7ff618fe8dd5c38fec07c31980f1 /drivers/net/wireless/iwlegacy/common.c
parentd71be937202853eda76562e9678073465d5c0fa8 (diff)
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.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlegacy/common.c b/drivers/net/wireless/iwlegacy/common.c
index 881ba043770a..36454d0bbeed 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)
{