// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * (c) Copyright 1998 Alan Cox <alan@lxorguk.ukuu.org.uk>
+/* (c) Copyright 1998 Alan Cox <alan@lxorguk.ukuu.org.uk>
* (c) Copyright 2000, 2001 Red Hat Inc
*
* Development of this driver was funded by Equiinet Ltd
z8530_write_port(c->dataio, val);
}
-/*
- * Register loading parameters for a dead port
+/* Register loading parameters for a dead port
*/
u8 z8530_dead_port[]=
};
EXPORT_SYMBOL(z8530_dead_port);
-/*
- * Register loading parameters for currently supported circuit types
+/* Register loading parameters for currently supported circuit types
*/
-/*
- * Data clocked by telco end. This is the correct data for the UK
+/* Data clocked by telco end. This is the correct data for the UK
* "kilostream" service, and most other similar services.
*/
};
EXPORT_SYMBOL(z8530_hdlc_kilostream);
-/*
- * As above but for enhanced chips.
+/* As above but for enhanced chips.
*/
u8 z8530_hdlc_kilostream_85230[]=
ch=read_zsdata(c);
stat=read_zsreg(c, R1);
- /*
- * Overrun ?
+ /* Overrun ?
*/
if(c->count < c->max)
{
if(stat&END_FR)
{
- /*
- * Error ?
+ /* Error ?
*/
if(stat&(Rx_OVR|CRC_ERR))
{
}
else
{
- /*
- * Drop the lock for RX processing, or
+ /* Drop the lock for RX processing, or
* there are deadlocks
*/
z8530_rx_done(c);
}
}
}
- /*
- * Clear irq
+ /* Clear irq
*/
write_zsctrl(c, ERR_RES);
write_zsctrl(c, RES_H_IUS);
if(!(read_zsreg(c, R0)&4))
return;
c->txcount--;
- /*
- * Shovel out the byte
+ /* Shovel out the byte
*/
write_zsreg(c, R8, *c->tx_ptr++);
write_zsctrl(c, RES_H_IUS);
}
}
- /*
- * End of frame TX - fire another one
+ /* End of frame TX - fire another one
*/
write_zsctrl(c, RES_Tx_P);
static void z8530_rx_clear(struct z8530_channel *c)
{
- /*
- * Data and status bytes
+ /* Data and status bytes
*/
u8 stat;
if(stat&END_FR)
write_zsctrl(c, RES_Rx_CRC);
- /*
- * Clear irq
+ /* Clear irq
*/
write_zsctrl(c, ERR_RES);
write_zsctrl(c, RES_H_IUS);
if(!(intr & (CHARxIP|CHATxIP|CHAEXT|CHBRxIP|CHBTxIP|CHBEXT)))
break;
- /* This holds the IRQ status. On the 8530 you must read it from chan
- A even though it applies to the whole chip */
+ /* This holds the IRQ status. On the 8530 you must read it
+ * from chan A even though it applies to the whole chip
+ */
/* Now walk the chip and see what it is wanting - it may be
- an IRQ for someone else remember */
+ * an IRQ for someone else remember
+ */
irqs=dev->chanA.irqs;
c->count = 0;
c->skb = NULL;
c->skb2 = NULL;
- /*
- * Load the DMA interfaces up
+
+ /* Load the DMA interfaces up
*/
c->rxdma_on = 0;
c->txdma_on = 0;
-
- /*
- * Allocate the DMA flip buffers. Limit by page size.
+
+ /* Allocate the DMA flip buffers. Limit by page size.
* Everyone runs 1500 mtu or less on wan links so this
* should be fine.
*/
c->dma_num=0;
c->dma_ready=1;
- /*
- * Enable DMA control mode
+ /* Enable DMA control mode
*/
spin_lock_irqsave(c->lock, cflags);
-
- /*
- * TX DMA via DIR/REQ
+
+ /* TX DMA via DIR/REQ
*/
c->regs[R14]|= DTRREQ;
c->regs[R1]&= ~TxINT_ENAB;
write_zsreg(c, R1, c->regs[R1]);
-
- /*
- * RX DMA via W/Req
+
+ /* RX DMA via W/Req
*/
c->regs[R1]|= WT_FN_RDYFN;
write_zsreg(c, R1, c->regs[R1]);
c->regs[R1]|= WT_RDY_ENAB;
write_zsreg(c, R1, c->regs[R1]);
-
- /*
- * DMA interrupts
+
+ /* DMA interrupts
*/
-
- /*
- * Set up the DMA configuration
+
+ /* Set up the DMA configuration
*/
dflags=claim_dma_lock();
disable_dma(c->txdma);
release_dma_lock(dflags);
-
- /*
- * Select the DMA interrupt handlers
+
+ /* Select the DMA interrupt handlers
*/
c->rxdma_on = 1;
c->irqs = &z8530_nop;
c->max = 0;
c->sync = 0;
-
- /*
- * Disable the PC DMA channels
+
+ /* Disable the PC DMA channels
*/
flags=claim_dma_lock();
spin_lock_irqsave(c->lock, flags);
- /*
- * Disable DMA control mode
+ /* Disable DMA control mode
*/
c->regs[R1]&= ~WT_RDY_ENAB;
c->count = 0;
c->skb = NULL;
c->skb2 = NULL;
-
- /*
- * Allocate the DMA flip buffers. Limit by page size.
+
+ /* Allocate the DMA flip buffers. Limit by page size.
* Everyone runs 1500 mtu or less on wan links so this
* should be fine.
*/
spin_lock_irqsave(c->lock, cflags);
- /*
- * Load the PIO receive ring
+ /* Load the PIO receive ring
*/
z8530_rx_done(c);
z8530_rx_done(c);
- /*
- * Load the DMA interfaces up
+ /* Load the DMA interfaces up
*/
c->rxdma_on = 0;
c->dma_ready=1;
c->dma_tx = 1;
- /*
- * Enable DMA control mode
+ /* Enable DMA control mode
*/
- /*
- * TX DMA via DIR/REQ
+ /* TX DMA via DIR/REQ
*/
c->regs[R14]|= DTRREQ;
write_zsreg(c, R14, c->regs[R14]);
c->regs[R1]&= ~TxINT_ENAB;
write_zsreg(c, R1, c->regs[R1]);
-
- /*
- * Set up the DMA configuration
+
+ /* Set up the DMA configuration
*/
dflags = claim_dma_lock();
disable_dma(c->txdma);
release_dma_lock(dflags);
-
- /*
- * Select the DMA interrupt handlers
+
+ /* Select the DMA interrupt handlers
*/
c->rxdma_on = 0;
c->irqs = &z8530_nop;
c->max = 0;
c->sync = 0;
-
- /*
- * Disable the PC DMA channels
+
+ /* Disable the PC DMA channels
*/
dflags = claim_dma_lock();
release_dma_lock(dflags);
- /*
- * Disable DMA control mode
+ /* Disable DMA control mode
*/
c->regs[R1]&= ~WT_RDY_ENAB;
}
EXPORT_SYMBOL(z8530_sync_txdma_close);
-/*
- * Name strings for Z8530 chips. SGI claim to have a 130, Zilog deny
+/* Name strings for Z8530 chips. SGI claim to have a 130, Zilog deny
* it exists...
*/
}
EXPORT_SYMBOL(z8530_describe);
-/*
- * Locked operation part of the z8530 init code
+/* Locked operation part of the z8530 init code
*/
static inline int do_z8530_init(struct z8530_dev *dev)
{
/* NOP the interrupt handlers first - we might get a
- floating IRQ transition when we reset the chip */
+ * floating IRQ transition when we reset the chip
+ */
dev->chanA.irqs=&z8530_nop;
dev->chanB.irqs=&z8530_nop;
dev->chanA.dcdcheck=DCD;
return -ENODEV;
dev->type=Z8530;
-
- /*
- * See the application note.
+
+ /* See the application note.
*/
write_zsreg(&dev->chanA, R15, 0x01);
-
- /*
- * If we can set the low bit of R15 then
+
+ /* If we can set the low bit of R15 then
* the chip is enhanced.
*/
else
dev->type = Z85C30; /* Z85C30, 1 byte FIFO */
}
-
- /*
- * The code assumes R7' and friends are
+
+ /* The code assumes R7' and friends are
* off. Use write_zsext() for these and keep
* this bit clear.
*/
write_zsreg(&dev->chanA, R15, 0);
-
- /*
- * At this point it looks like the chip is behaving
+
+ /* At this point it looks like the chip is behaving
*/
memcpy(dev->chanA.regs, reg_init, 16);
{
flags=claim_dma_lock();
disable_dma(c->txdma);
- /*
- * Check if we crapped out.
+ /* Check if we crapped out.
*/
if (get_dma_residue(c->txdma))
{
if(c->dma_tx)
{
- /*
- * FIXME. DMA is broken for the original 8530,
+ /* FIXME. DMA is broken for the original 8530,
* on the older parts we need to set a flag and
* wait for a further TX interrupt to fire this
* stage off
flags=claim_dma_lock();
disable_dma(c->txdma);
- /*
- * These two are needed by the 8530/85C30
+ /* These two are needed by the 8530/85C30
* and must be issued when idling.
*/
}
}
}
- /*
- * Since we emptied tx_skb we can ask for more
+ /* Since we emptied tx_skb we can ask for more
*/
netif_wake_queue(c->netdevice);
}
{
struct sk_buff *skb;
int ct;
-
- /*
- * Is our receive engine in DMA mode
+
+ /* Is our receive engine in DMA mode
*/
if(c->rxdma_on)
{
- /*
- * Save the ready state and the buffer currently
+ /* Save the ready state and the buffer currently
* being used as the DMA target
*/
int ready=c->dma_ready;
unsigned char *rxb=c->rx_buf[c->dma_num];
unsigned long flags;
-
- /*
- * Complete this DMA. Necessary to find the length
+
+ /* Complete this DMA. Necessary to find the length
*/
flags=claim_dma_lock();
if(ct<0)
ct=2; /* Shit happens.. */
c->dma_ready=0;
-
- /*
- * Normal case: the other slot is free, start the next DMA
+
+ /* Normal case: the other slot is free, start the next DMA
* into it immediately.
*/
set_dma_count(c->rxdma, c->mtu);
c->rxdma_on = 1;
enable_dma(c->rxdma);
- /* Stop any frames that we missed the head of
- from passing */
+ /* Stop any frames that we missed the head of
+ * from passing
+ */
write_zsreg(c, R0, RES_Rx_CRC);
}
else
/* Can't occur as we dont reenable the DMA irq until
- after the flip is done */
+ * after the flip is done
+ */
netdev_warn(c->netdevice, "DMA flip overrun!\n");
release_dma_lock(flags);
- /*
- * Shove the old buffer into an sk_buff. We can't DMA
+ /* Shove the old buffer into an sk_buff. We can't DMA
* directly into one on a PC - it might be above the 16Mb
* boundary. Optimisation - we could check to see if we
* can avoid the copy. Optimisation 2 - make the memcpy
RT_LOCK;
skb = c->skb;
- /*
- * The game we play for non DMA is similar. We want to
+ /* The game we play for non DMA is similar. We want to
* get the controller set up for the next packet as fast
* as possible. We potentially only have one byte + the
* fifo length for this. Thus we want to flip to the new
c->netdevice->stats.rx_packets++;
c->netdevice->stats.rx_bytes += ct;
}
- /*
- * If we received a frame we must now process it.
+ /* If we received a frame we must now process it.
*/
if (skb) {
skb_trim(skb, ct);
return NETDEV_TX_BUSY;
/* PC SPECIFIC - DMA limits */
-
- /*
- * If we will DMA the transmit and its gone over the ISA bus
+ /* If we will DMA the transmit and its gone over the ISA bus
* limit, then copy to the flip buffer
*/
if(c->dma_tx && ((unsigned long)(virt_to_bus(skb->data+skb->len))>=16*1024*1024 || spans_boundary(skb)))
{
- /*
- * Send the flip buffer, and flip the flippy bit.
+ /* Send the flip buffer, and flip the flippy bit.
* We don't care which is used when just so long as
* we never use the same buffer twice in a row. Since
* only one buffer can be going out at a time the other
}
EXPORT_SYMBOL(z8530_queue_xmit);
-/*
- * Module support
+/* Module support
*/
static const char banner[] __initconst =
KERN_INFO "Generic Z85C30/Z85230 interface driver v0.02\n";
projects / platform / kernel / linux-rpi.git / commitdiff