diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/libertas/if_cs.c | 61 |
1 files changed, 29 insertions, 32 deletions
diff --git a/drivers/net/wireless/libertas/if_cs.c b/drivers/net/wireless/libertas/if_cs.c index 86bb1268885..5963d92cc94 100644 --- a/drivers/net/wireless/libertas/if_cs.c +++ b/drivers/net/wireless/libertas/if_cs.c @@ -215,9 +215,21 @@ static int if_cs_poll_while_fw_download(struct if_cs_card *card, uint addr, u8 r /********************************************************************/ -/* I/O */ +/* I/O and interrupt handling */ /********************************************************************/ +static inline void if_cs_enable_ints(struct if_cs_card *card) +{ + lbs_deb_enter(LBS_DEB_CS); + if_cs_write16(card, IF_CS_H_INT_MASK, 0); +} + +static inline void if_cs_disable_ints(struct if_cs_card *card) +{ + lbs_deb_enter(LBS_DEB_CS); + if_cs_write16(card, IF_CS_H_INT_MASK, IF_CS_H_IM_MASK); +} + /* * Called from if_cs_host_to_card to send a command to the hardware */ @@ -228,6 +240,7 @@ static int if_cs_send_cmd(struct lbs_private *priv, u8 *buf, u16 nb) int loops = 0; lbs_deb_enter(LBS_DEB_CS); + if_cs_disable_ints(card); /* Is hardware ready? */ while (1) { @@ -258,19 +271,24 @@ static int if_cs_send_cmd(struct lbs_private *priv, u8 *buf, u16 nb) ret = 0; done: + if_cs_enable_ints(card); lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret); return ret; } - /* * Called from if_cs_host_to_card to send a data to the hardware */ static void if_cs_send_data(struct lbs_private *priv, u8 *buf, u16 nb) { struct if_cs_card *card = (struct if_cs_card *)priv->card; + u16 status; lbs_deb_enter(LBS_DEB_CS); + if_cs_disable_ints(card); + + status = if_cs_read16(card, IF_CS_C_STATUS); + BUG_ON((status & IF_CS_C_S_TX_DNLD_RDY) == 0); if_cs_write16(card, IF_CS_H_WRITE_LEN, nb); @@ -281,11 +299,11 @@ static void if_cs_send_data(struct lbs_private *priv, u8 *buf, u16 nb) if_cs_write16(card, IF_CS_H_STATUS, IF_CS_H_STATUS_TX_OVER); if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_STATUS_TX_OVER); + if_cs_enable_ints(card); lbs_deb_leave(LBS_DEB_CS); } - /* * Get the command result out of the card. */ @@ -330,7 +348,6 @@ out: return ret; } - static struct sk_buff *if_cs_receive_data(struct lbs_private *priv) { struct sk_buff *skb = NULL; @@ -367,25 +384,6 @@ out: return skb; } - - -/********************************************************************/ -/* Interrupts */ -/********************************************************************/ - -static inline void if_cs_enable_ints(struct if_cs_card *card) -{ - lbs_deb_enter(LBS_DEB_CS); - if_cs_write16(card, IF_CS_H_INT_MASK, 0); -} - -static inline void if_cs_disable_ints(struct if_cs_card *card) -{ - lbs_deb_enter(LBS_DEB_CS); - if_cs_write16(card, IF_CS_H_INT_MASK, IF_CS_H_IM_MASK); -} - - static irqreturn_t if_cs_interrupt(int irq, void *data) { struct if_cs_card *card = data; @@ -394,10 +392,8 @@ static irqreturn_t if_cs_interrupt(int irq, void *data) lbs_deb_enter(LBS_DEB_CS); + /* Ask card interrupt cause register if there is something for us */ cause = if_cs_read16(card, IF_CS_C_INT_CAUSE); - if_cs_write16(card, IF_CS_C_INT_CAUSE, cause & IF_CS_C_IC_MASK); - - lbs_deb_cs("cause 0x%04x\n", cause); if (cause == 0) { /* Not for us */ return IRQ_NONE; @@ -409,9 +405,9 @@ static irqreturn_t if_cs_interrupt(int irq, void *data) return IRQ_HANDLED; } - /* TODO: I'm not sure what the best ordering is */ - - cause = if_cs_read16(card, IF_CS_C_STATUS) & IF_CS_C_S_MASK; + /* Clear interrupt cause */ + if_cs_write16(card, IF_CS_C_INT_CAUSE, cause & IF_CS_C_IC_MASK); + lbs_deb_cs("cause 0x%04x\n", cause); if (cause & IF_CS_C_S_RX_UPLD_RDY) { struct sk_buff *skb; @@ -422,7 +418,7 @@ static irqreturn_t if_cs_interrupt(int irq, void *data) } if (cause & IF_CS_H_IC_TX_OVER) { - lbs_deb_cs("tx over\n"); + lbs_deb_cs("tx done\n"); lbs_host_to_card_done(priv); } @@ -430,7 +426,7 @@ static irqreturn_t if_cs_interrupt(int irq, void *data) unsigned long flags; u8 i; - lbs_deb_cs("cmd upload ready\n"); + lbs_deb_cs("cmd resp\n"); spin_lock_irqsave(&priv->driver_lock, flags); i = (priv->resp_idx == 0) ? 1 : 0; spin_unlock_irqrestore(&priv->driver_lock, flags); @@ -449,10 +445,11 @@ static irqreturn_t if_cs_interrupt(int irq, void *data) & IF_CS_C_S_STATUS_MASK; if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_HOST_EVENT); - lbs_deb_cs("eventcause 0x%04x\n", event); + lbs_deb_cs("host event 0x%04x\n", event); lbs_queue_event(priv, event >> 8 & 0xff); } + lbs_deb_leave(LBS_DEB_CS); return IRQ_HANDLED; } |