static struct net_device_stats *scc_get_stats(struct net_device *dev);
static int scc_set_mac_address(struct net_device *dev, void *sa);
-static irqreturn_t scc_isr(int irq, void *dev_id, struct pt_regs * regs);
+static inline void tx_on(struct scc_priv *priv);
+static inline void rx_on(struct scc_priv *priv);
+static inline void rx_off(struct scc_priv *priv);
+static void start_timer(struct scc_priv *priv, int t, int r15);
+static inline unsigned char random(void);
+
static inline void z8530_isr(struct scc_info *info);
+static irqreturn_t scc_isr(int irq, void *dev_id, struct pt_regs * regs);
static void rx_isr(struct scc_priv *priv);
static void special_condition(struct scc_priv *priv, int rc);
static void rx_bh(void *arg);
static void es_isr(struct scc_priv *priv);
static void tm_isr(struct scc_priv *priv);
-static inline void tx_on(struct scc_priv *priv);
-static inline void rx_on(struct scc_priv *priv);
-static inline void rx_off(struct scc_priv *priv);
-static void start_timer(struct scc_priv *priv, int t, int r15);
-static inline unsigned char random(void);
-
/* Initialization variables */
}
-static irqreturn_t scc_isr(int irq, void *dev_id, struct pt_regs * regs) {
- struct scc_info *info = dev_id;
+static inline void tx_on(struct scc_priv *priv) {
+ int i, n;
+ unsigned long flags;
- spin_lock(info->priv[0].register_lock);
- /* At this point interrupts are enabled, and the interrupt under service
- is already acknowledged, but masked off.
+ if (priv->param.dma >= 0) {
+ n = (priv->chip == Z85230) ? 3 : 1;
+ /* Program DMA controller */
+ flags = claim_dma_lock();
+ set_dma_mode(priv->param.dma, DMA_MODE_WRITE);
+ set_dma_addr(priv->param.dma, (int) priv->tx_buf[priv->tx_tail]+n);
+ set_dma_count(priv->param.dma, priv->tx_len[priv->tx_tail]-n);
+ release_dma_lock(flags);
+ /* Enable TX underrun interrupt */
+ write_scc(priv, R15, TxUIE);
+ /* Configure DREQ */
+ if (priv->type == TYPE_TWIN)
+ outb((priv->param.dma == 1) ? TWIN_DMA_HDX_T1 : TWIN_DMA_HDX_T3,
+ priv->card_base + TWIN_DMA_CFG);
+ else
+ write_scc(priv, R1, EXT_INT_ENAB | WT_FN_RDYFN | WT_RDY_ENAB);
+ /* Write first byte(s) */
+ spin_lock_irqsave(priv->register_lock, flags);
+ for (i = 0; i < n; i++)
+ write_scc_data(priv, priv->tx_buf[priv->tx_tail][i], 1);
+ enable_dma(priv->param.dma);
+ spin_unlock_irqrestore(priv->register_lock, flags);
+ } else {
+ write_scc(priv, R15, TxUIE);
+ write_scc(priv, R1, EXT_INT_ENAB | WT_FN_RDYFN | TxINT_ENAB);
+ tx_isr(priv);
+ }
+ /* Reset EOM latch if we do not have the AUTOEOM feature */
+ if (priv->chip == Z8530) write_scc(priv, R0, RES_EOM_L);
+}
- Interrupt processing: We loop until we know that the IRQ line is
- low. If another positive edge occurs afterwards during the ISR,
- another interrupt will be triggered by the interrupt controller
- as soon as the IRQ level is enabled again (see asm/irq.h).
- Bottom-half handlers will be processed after scc_isr(). This is
- important, since we only have small ringbuffers and want new data
- to be fetched/delivered immediately. */
+static inline void rx_on(struct scc_priv *priv) {
+ unsigned long flags;
- if (info->priv[0].type == TYPE_TWIN) {
- int is, card_base = info->priv[0].card_base;
- while ((is = ~inb(card_base + TWIN_INT_REG)) &
- TWIN_INT_MSK) {
- if (is & TWIN_SCC_MSK) {
- z8530_isr(info);
- } else if (is & TWIN_TMR1_MSK) {
- inb(card_base + TWIN_CLR_TMR1);
- tm_isr(&info->priv[0]);
- } else {
- inb(card_base + TWIN_CLR_TMR2);
- tm_isr(&info->priv[1]);
- }
+ /* Clear RX FIFO */
+ while (read_scc(priv, R0) & Rx_CH_AV) read_scc_data(priv);
+ priv->rx_over = 0;
+ if (priv->param.dma >= 0) {
+ /* Program DMA controller */
+ flags = claim_dma_lock();
+ set_dma_mode(priv->param.dma, DMA_MODE_READ);
+ set_dma_addr(priv->param.dma, (int) priv->rx_buf[priv->rx_head]);
+ set_dma_count(priv->param.dma, BUF_SIZE);
+ release_dma_lock(flags);
+ enable_dma(priv->param.dma);
+ /* Configure PackeTwin DMA */
+ if (priv->type == TYPE_TWIN) {
+ outb((priv->param.dma == 1) ? TWIN_DMA_HDX_R1 : TWIN_DMA_HDX_R3,
+ priv->card_base + TWIN_DMA_CFG);
}
- } else z8530_isr(info);
- spin_unlock(info->priv[0].register_lock);
- return IRQ_HANDLED;
+ /* Sp. cond. intr. only, ext int enable, RX DMA enable */
+ write_scc(priv, R1, EXT_INT_ENAB | INT_ERR_Rx |
+ WT_RDY_RT | WT_FN_RDYFN | WT_RDY_ENAB);
+ } else {
+ /* Reset current frame */
+ priv->rx_ptr = 0;
+ /* Intr. on all Rx characters and Sp. cond., ext int enable */
+ write_scc(priv, R1, EXT_INT_ENAB | INT_ALL_Rx | WT_RDY_RT |
+ WT_FN_RDYFN);
+ }
+ write_scc(priv, R0, ERR_RES);
+ write_scc(priv, R3, RxENABLE | Rx8 | RxCRC_ENAB);
+}
+
+
+static inline void rx_off(struct scc_priv *priv) {
+ /* Disable receiver */
+ write_scc(priv, R3, Rx8);
+ /* Disable DREQ / RX interrupt */
+ if (priv->param.dma >= 0 && priv->type == TYPE_TWIN)
+ outb(0, priv->card_base + TWIN_DMA_CFG);
+ else
+ write_scc(priv, R1, EXT_INT_ENAB | WT_FN_RDYFN);
+ /* Disable DMA */
+ if (priv->param.dma >= 0) disable_dma(priv->param.dma);
+}
+
+
+static void start_timer(struct scc_priv *priv, int t, int r15) {
+ unsigned long flags;
+
+ outb(priv->tmr_mode, priv->tmr_ctrl);
+ if (t == 0) {
+ tm_isr(priv);
+ } else if (t > 0) {
+ save_flags(flags);
+ cli();
+ outb(t & 0xFF, priv->tmr_cnt);
+ outb((t >> 8) & 0xFF, priv->tmr_cnt);
+ if (priv->type != TYPE_TWIN) {
+ write_scc(priv, R15, r15 | CTSIE);
+ priv->rr0 |= CTS;
+ }
+ restore_flags(flags);
+ }
}
+static inline unsigned char random(void) {
+ /* See "Numerical Recipes in C", second edition, p. 284 */
+ rand = rand * 1664525L + 1013904223L;
+ return (unsigned char) (rand >> 24);
+}
+
static inline void z8530_isr(struct scc_info *info) {
int is, i = 100;
}
+static irqreturn_t scc_isr(int irq, void *dev_id, struct pt_regs * regs) {
+ struct scc_info *info = dev_id;
+
+ spin_lock(info->priv[0].register_lock);
+ /* At this point interrupts are enabled, and the interrupt under service
+ is already acknowledged, but masked off.
+
+ Interrupt processing: We loop until we know that the IRQ line is
+ low. If another positive edge occurs afterwards during the ISR,
+ another interrupt will be triggered by the interrupt controller
+ as soon as the IRQ level is enabled again (see asm/irq.h).
+
+ Bottom-half handlers will be processed after scc_isr(). This is
+ important, since we only have small ringbuffers and want new data
+ to be fetched/delivered immediately. */
+
+ if (info->priv[0].type == TYPE_TWIN) {
+ int is, card_base = info->priv[0].card_base;
+ while ((is = ~inb(card_base + TWIN_INT_REG)) &
+ TWIN_INT_MSK) {
+ if (is & TWIN_SCC_MSK) {
+ z8530_isr(info);
+ } else if (is & TWIN_TMR1_MSK) {
+ inb(card_base + TWIN_CLR_TMR1);
+ tm_isr(&info->priv[0]);
+ } else {
+ inb(card_base + TWIN_CLR_TMR2);
+ tm_isr(&info->priv[1]);
+ }
+ }
+ } else z8530_isr(info);
+ spin_unlock(info->priv[0].register_lock);
+ return IRQ_HANDLED;
+}
+
+
static void rx_isr(struct scc_priv *priv) {
if (priv->param.dma >= 0) {
/* Check special condition and perform error reset. See 2.4.7.5. */
break;
}
}
-
-
-static inline void tx_on(struct scc_priv *priv) {
- int i, n;
- unsigned long flags;
-
- if (priv->param.dma >= 0) {
- n = (priv->chip == Z85230) ? 3 : 1;
- /* Program DMA controller */
- flags = claim_dma_lock();
- set_dma_mode(priv->param.dma, DMA_MODE_WRITE);
- set_dma_addr(priv->param.dma, (int) priv->tx_buf[priv->tx_tail]+n);
- set_dma_count(priv->param.dma, priv->tx_len[priv->tx_tail]-n);
- release_dma_lock(flags);
- /* Enable TX underrun interrupt */
- write_scc(priv, R15, TxUIE);
- /* Configure DREQ */
- if (priv->type == TYPE_TWIN)
- outb((priv->param.dma == 1) ? TWIN_DMA_HDX_T1 : TWIN_DMA_HDX_T3,
- priv->card_base + TWIN_DMA_CFG);
- else
- write_scc(priv, R1, EXT_INT_ENAB | WT_FN_RDYFN | WT_RDY_ENAB);
- /* Write first byte(s) */
- spin_lock_irqsave(priv->register_lock, flags);
- for (i = 0; i < n; i++)
- write_scc_data(priv, priv->tx_buf[priv->tx_tail][i], 1);
- enable_dma(priv->param.dma);
- spin_unlock_irqrestore(priv->register_lock, flags);
- } else {
- write_scc(priv, R15, TxUIE);
- write_scc(priv, R1, EXT_INT_ENAB | WT_FN_RDYFN | TxINT_ENAB);
- tx_isr(priv);
- }
- /* Reset EOM latch if we do not have the AUTOEOM feature */
- if (priv->chip == Z8530) write_scc(priv, R0, RES_EOM_L);
-}
-
-
-static inline void rx_on(struct scc_priv *priv) {
- unsigned long flags;
-
- /* Clear RX FIFO */
- while (read_scc(priv, R0) & Rx_CH_AV) read_scc_data(priv);
- priv->rx_over = 0;
- if (priv->param.dma >= 0) {
- /* Program DMA controller */
- flags = claim_dma_lock();
- set_dma_mode(priv->param.dma, DMA_MODE_READ);
- set_dma_addr(priv->param.dma, (int) priv->rx_buf[priv->rx_head]);
- set_dma_count(priv->param.dma, BUF_SIZE);
- release_dma_lock(flags);
- enable_dma(priv->param.dma);
- /* Configure PackeTwin DMA */
- if (priv->type == TYPE_TWIN) {
- outb((priv->param.dma == 1) ? TWIN_DMA_HDX_R1 : TWIN_DMA_HDX_R3,
- priv->card_base + TWIN_DMA_CFG);
- }
- /* Sp. cond. intr. only, ext int enable, RX DMA enable */
- write_scc(priv, R1, EXT_INT_ENAB | INT_ERR_Rx |
- WT_RDY_RT | WT_FN_RDYFN | WT_RDY_ENAB);
- } else {
- /* Reset current frame */
- priv->rx_ptr = 0;
- /* Intr. on all Rx characters and Sp. cond., ext int enable */
- write_scc(priv, R1, EXT_INT_ENAB | INT_ALL_Rx | WT_RDY_RT |
- WT_FN_RDYFN);
- }
- write_scc(priv, R0, ERR_RES);
- write_scc(priv, R3, RxENABLE | Rx8 | RxCRC_ENAB);
-}
-
-
-static inline void rx_off(struct scc_priv *priv) {
- /* Disable receiver */
- write_scc(priv, R3, Rx8);
- /* Disable DREQ / RX interrupt */
- if (priv->param.dma >= 0 && priv->type == TYPE_TWIN)
- outb(0, priv->card_base + TWIN_DMA_CFG);
- else
- write_scc(priv, R1, EXT_INT_ENAB | WT_FN_RDYFN);
- /* Disable DMA */
- if (priv->param.dma >= 0) disable_dma(priv->param.dma);
-}
-
-
-static void start_timer(struct scc_priv *priv, int t, int r15) {
- unsigned long flags;
-
- outb(priv->tmr_mode, priv->tmr_ctrl);
- if (t == 0) {
- tm_isr(priv);
- } else if (t > 0) {
- save_flags(flags);
- cli();
- outb(t & 0xFF, priv->tmr_cnt);
- outb((t >> 8) & 0xFF, priv->tmr_cnt);
- if (priv->type != TYPE_TWIN) {
- write_scc(priv, R15, r15 | CTSIE);
- priv->rr0 |= CTS;
- }
- restore_flags(flags);
- }
-}
-
-
-static inline unsigned char random(void) {
- /* See "Numerical Recipes in C", second edition, p. 284 */
- rand = rand * 1664525L + 1013904223L;
- return (unsigned char) (rand >> 24);
-}
-
git://git.onelab.eu / linux-2.6.git / blobdiff