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atheros/ath9k: add common read/write ops and port ath9k to use it

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In an effort to make hw code driver core agnostic read
and write operations are defined on the ath_common structure.
This patch adds that and makes ath9k use it. This allows
drivers like ath9k_htc to define its own read/write ops and
still rely on the same hw code. This also paves the way for
sharing code between ath9k/ath5k/ath9k_htc.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez
2009-09-10 16:11:21 -07:00
committed by John W. Linville
parent 867633f026
commit 9e4bffd233
5 changed files with 63 additions and 47 deletions
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42
drivers/net/wireless/ath/ath9k/main.c
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@@ -1489,6 +1489,47 @@ static int ath_init_btcoex_timer(struct ath_softc *sc)
return 0;
}
/*
* Read and write, they both share the same lock. We do this to serialize
* reads and writes on Atheros 802.11n PCI devices only. This is required
* as the FIFO on these devices can only accept sanely 2 requests. After
* that the device goes bananas. Serializing the reads/writes prevents this
* from happening.
*/
static void ath9k_iowrite32(void *hw_priv, u32 val, u32 reg_offset)
{
struct ath_hw *ah = (struct ath_hw *) hw_priv;
if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
unsigned long flags;
spin_lock_irqsave(&ah->ah_sc->sc_serial_rw, flags);
iowrite32(val, ah->ah_sc->mem + reg_offset);
spin_unlock_irqrestore(&ah->ah_sc->sc_serial_rw, flags);
} else
iowrite32(val, ah->ah_sc->mem + reg_offset);
}
static unsigned int ath9k_ioread32(void *hw_priv, u32 reg_offset)
{
struct ath_hw *ah = (struct ath_hw *) hw_priv;
u32 val;
if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
unsigned long flags;
spin_lock_irqsave(&ah->ah_sc->sc_serial_rw, flags);
val = ioread32(ah->ah_sc->mem + reg_offset);
spin_unlock_irqrestore(&ah->ah_sc->sc_serial_rw, flags);
} else
val = ioread32(ah->ah_sc->mem + reg_offset);
return val;
}
static struct ath_ops ath9k_common_ops = {
.read = ath9k_ioread32,
.write = ath9k_iowrite32,
};
/*
* Initialize and fill ath_softc, ath_sofct is the
* "Software Carrier" struct. Historically it has existed
@@ -1528,6 +1569,7 @@ static int ath_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid)
sc->sc_ah = ah;
common = ath9k_hw_common(ah);
common->ops = &ath9k_common_ops;
/*
* Cache line size is used to size and align various