diff options
Diffstat (limited to 'drivers/net/irda/sa1100_ir.c')
| -rw-r--r-- | drivers/net/irda/sa1100_ir.c | 290 |
1 files changed, 141 insertions, 149 deletions
diff --git a/drivers/net/irda/sa1100_ir.c b/drivers/net/irda/sa1100_ir.c index 32dee3322679..61b42d1265b4 100644 --- a/drivers/net/irda/sa1100_ir.c +++ b/drivers/net/irda/sa1100_ir.c @@ -164,151 +164,6 @@ static int sa1100_irda_sir_tx_start(struct sk_buff *skb, struct net_device *dev, return NETDEV_TX_OK; } -/* - * FIR format support. - */ -static int sa1100_irda_fir_tx_start(struct sk_buff *skb, struct net_device *dev, - struct sa1100_irda *si) -{ - int mtt = irda_get_mtt(skb); - - si->dma_tx.skb = skb; - si->dma_tx.dma = dma_map_single(si->dev, skb->data, skb->len, - DMA_TO_DEVICE); - if (dma_mapping_error(si->dev, si->dma_tx.dma)) { - si->dma_tx.skb = NULL; - netif_wake_queue(dev); - dev->stats.tx_dropped++; - dev_kfree_skb(skb); - return NETDEV_TX_OK; - } - - sa1100_start_dma(si->dma_tx.regs, si->dma_tx.dma, skb->len); - - /* - * If we have a mean turn-around time, impose the specified - * specified delay. We could shorten this by timing from - * the point we received the packet. - */ - if (mtt) - udelay(mtt); - - Ser2HSCR0 = si->hscr0 | HSCR0_HSSP | HSCR0_TXE; - - return NETDEV_TX_OK; -} - -static irqreturn_t sa1100_irda_sir_irq(struct net_device *, struct sa1100_irda *); -static irqreturn_t sa1100_irda_fir_irq(struct net_device *, struct sa1100_irda *); - -/* - * Set the IrDA communications speed. - */ -static int sa1100_irda_set_speed(struct sa1100_irda *si, int speed) -{ - unsigned long flags; - int brd, ret = -EINVAL; - - switch (speed) { - case 9600: case 19200: case 38400: - case 57600: case 115200: - brd = 3686400 / (16 * speed) - 1; - - /* - * Stop the receive DMA. - */ - if (IS_FIR(si)) - sa1100_stop_dma(si->dma_rx.regs); - - local_irq_save(flags); - - Ser2UTCR3 = 0; - Ser2HSCR0 = HSCR0_UART; - - Ser2UTCR1 = brd >> 8; - Ser2UTCR2 = brd; - - /* - * Clear status register - */ - Ser2UTSR0 = UTSR0_REB | UTSR0_RBB | UTSR0_RID; - Ser2UTCR3 = UTCR3_RIE | UTCR3_RXE | UTCR3_TXE; - - if (si->pdata->set_speed) - si->pdata->set_speed(si->dev, speed); - - si->speed = speed; - si->tx_start = sa1100_irda_sir_tx_start; - si->irq = sa1100_irda_sir_irq; - - local_irq_restore(flags); - ret = 0; - break; - - case 4000000: - local_irq_save(flags); - - si->hscr0 = 0; - - Ser2HSSR0 = 0xff; - Ser2HSCR0 = si->hscr0 | HSCR0_HSSP; - Ser2UTCR3 = 0; - - si->speed = speed; - si->tx_start = sa1100_irda_fir_tx_start; - si->irq = sa1100_irda_fir_irq; - - if (si->pdata->set_speed) - si->pdata->set_speed(si->dev, speed); - - sa1100_irda_rx_alloc(si); - sa1100_irda_rx_dma_start(si); - - local_irq_restore(flags); - - break; - - default: - break; - } - - return ret; -} - -/* - * Control the power state of the IrDA transmitter. - * State: - * 0 - off - * 1 - short range, lowest power - * 2 - medium range, medium power - * 3 - maximum range, high power - * - * Currently, only assabet is known to support this. - */ -static int -__sa1100_irda_set_power(struct sa1100_irda *si, unsigned int state) -{ - int ret = 0; - if (si->pdata->set_power) - ret = si->pdata->set_power(si->dev, state); - return ret; -} - -static inline int -sa1100_set_power(struct sa1100_irda *si, unsigned int state) -{ - int ret; - - ret = __sa1100_irda_set_power(si, state); - if (ret == 0) - si->power = state; - - return ret; -} - -/* - * HP-SIR format interrupt service routines. - */ static irqreturn_t sa1100_irda_sir_irq(struct net_device *dev, struct sa1100_irda *si) { int status; @@ -403,6 +258,40 @@ static irqreturn_t sa1100_irda_sir_irq(struct net_device *dev, struct sa1100_ird return IRQ_HANDLED; } +/* + * FIR format support. + */ +static int sa1100_irda_fir_tx_start(struct sk_buff *skb, struct net_device *dev, + struct sa1100_irda *si) +{ + int mtt = irda_get_mtt(skb); + + si->dma_tx.skb = skb; + si->dma_tx.dma = dma_map_single(si->dev, skb->data, skb->len, + DMA_TO_DEVICE); + if (dma_mapping_error(si->dev, si->dma_tx.dma)) { + si->dma_tx.skb = NULL; + netif_wake_queue(dev); + dev->stats.tx_dropped++; + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + + sa1100_start_dma(si->dma_tx.regs, si->dma_tx.dma, skb->len); + + /* + * If we have a mean turn-around time, impose the specified + * specified delay. We could shorten this by timing from + * the point we received the packet. + */ + if (mtt) + udelay(mtt); + + Ser2HSCR0 = si->hscr0 | HSCR0_HSSP | HSCR0_TXE; + + return NETDEV_TX_OK; +} + static void sa1100_irda_fir_error(struct sa1100_irda *si, struct net_device *dev) { struct sk_buff *skb = si->dma_rx.skb; @@ -476,10 +365,8 @@ static void sa1100_irda_fir_error(struct sa1100_irda *si, struct net_device *dev } /* - * FIR format interrupt service routine. We only have to - * handle RX events; transmit events go via the TX DMA handler. - * - * No matter what, we disable RX, process, and the restart RX. + * We only have to handle RX events here; transmit events go via the TX + * DMA handler. We disable RX, process, and the restart RX. */ static irqreturn_t sa1100_irda_fir_irq(struct net_device *dev, struct sa1100_irda *si) { @@ -528,6 +415,111 @@ static irqreturn_t sa1100_irda_fir_irq(struct net_device *dev, struct sa1100_ird return IRQ_HANDLED; } +/* + * Set the IrDA communications speed. + */ +static int sa1100_irda_set_speed(struct sa1100_irda *si, int speed) +{ + unsigned long flags; + int brd, ret = -EINVAL; + + switch (speed) { + case 9600: case 19200: case 38400: + case 57600: case 115200: + brd = 3686400 / (16 * speed) - 1; + + /* + * Stop the receive DMA. + */ + if (IS_FIR(si)) + sa1100_stop_dma(si->dma_rx.regs); + + local_irq_save(flags); + + Ser2UTCR3 = 0; + Ser2HSCR0 = HSCR0_UART; + + Ser2UTCR1 = brd >> 8; + Ser2UTCR2 = brd; + + /* + * Clear status register + */ + Ser2UTSR0 = UTSR0_REB | UTSR0_RBB | UTSR0_RID; + Ser2UTCR3 = UTCR3_RIE | UTCR3_RXE | UTCR3_TXE; + + if (si->pdata->set_speed) + si->pdata->set_speed(si->dev, speed); + + si->speed = speed; + si->tx_start = sa1100_irda_sir_tx_start; + si->irq = sa1100_irda_sir_irq; + + local_irq_restore(flags); + ret = 0; + break; + + case 4000000: + local_irq_save(flags); + + si->hscr0 = 0; + + Ser2HSSR0 = 0xff; + Ser2HSCR0 = si->hscr0 | HSCR0_HSSP; + Ser2UTCR3 = 0; + + si->speed = speed; + si->tx_start = sa1100_irda_fir_tx_start; + si->irq = sa1100_irda_fir_irq; + + if (si->pdata->set_speed) + si->pdata->set_speed(si->dev, speed); + + sa1100_irda_rx_alloc(si); + sa1100_irda_rx_dma_start(si); + + local_irq_restore(flags); + + break; + + default: + break; + } + + return ret; +} + +/* + * Control the power state of the IrDA transmitter. + * State: + * 0 - off + * 1 - short range, lowest power + * 2 - medium range, medium power + * 3 - maximum range, high power + * + * Currently, only assabet is known to support this. + */ +static int +__sa1100_irda_set_power(struct sa1100_irda *si, unsigned int state) +{ + int ret = 0; + if (si->pdata->set_power) + ret = si->pdata->set_power(si->dev, state); + return ret; +} + +static inline int +sa1100_set_power(struct sa1100_irda *si, unsigned int state) +{ + int ret; + + ret = __sa1100_irda_set_power(si, state); + if (ret == 0) + si->power = state; + + return ret; +} + static irqreturn_t sa1100_irda_irq(int irq, void *dev_id) { struct net_device *dev = dev_id; |
