/* Transmit DMA interrupt service */
static inline void sca_tx_intr(port_t *port)
{
struct net_device *dev = port_to_dev(port);
u16 dmac = get_dmac_tx(port);
card_t* card = port_to_card(port);
u8 stat;
spin_lock(&port->lock);
stat = sca_in(DSR_TX(phy_node(port)), card); /* read DMA Status */
/* Reset DSR status bits */
sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
DSR_TX(phy_node(port)), card);
while (1) {
pkt_desc __iomem *desc;
u32 desc_off = desc_offset(port, port->txlast, 1);
u32 cda = sca_ina(dmac + CDAL, card);
if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
break; /* Transmitter is/will_be sending this frame */
desc = desc_address(port, port->txlast, 1);
dev->stats.tx_packets++;
dev->stats.tx_bytes += readw(&desc->len);
writeb(0, &desc->stat); /* Free descriptor */
port->txlast = next_desc(port, port->txlast, 1);
}
netif_wake_queue(dev);
spin_unlock(&port->lock);
}
static void sca_init_port(port_t *port)
{
card_t *card = port->card;
u16 dmac_rx = get_dmac_rx(port), dmac_tx = get_dmac_tx(port);
int transmit, i;
port->rxin = 0;
port->txin = 0;
port->txlast = 0;
for (transmit = 0; transmit < 2; transmit++) {
u16 buffs = transmit ? card->tx_ring_buffers
: card->rx_ring_buffers;
for (i = 0; i < buffs; i++) {
pkt_desc __iomem *desc = desc_address(port, i, transmit);
u16 chain_off = hd_desc_offset(port, i + 1, transmit);
u32 buff_off = buffer_offset(port, i, transmit);
writel(chain_off, &desc->cp);
writel(buff_off, &desc->bp);
writew(0, &desc->len);
writeb(0, &desc->stat);
}
}
/* DMA disable - to halt state */
sca_out(0, DSR_RX(port->chan), card);
sca_out(0, DSR_TX(port->chan), card);
/* software ABORT - to initial state */
sca_out(DCR_ABORT, DCR_RX(port->chan), card);
sca_out(DCR_ABORT, DCR_TX(port->chan), card);
/* current desc addr */
sca_outl(hd_desc_offset(port, 0, 0), dmac_rx + CDAL, card);
sca_outl(hd_desc_offset(port, card->tx_ring_buffers - 1, 0),
dmac_rx + EDAL, card);
sca_outl(hd_desc_offset(port, 0, 1), dmac_tx + CDAL, card);
sca_outl(hd_desc_offset(port, 0, 1), dmac_tx + EDAL, card);
/* clear frame end interrupt counter */
sca_out(DCR_CLEAR_EOF, DCR_RX(port->chan), card);
sca_out(DCR_CLEAR_EOF, DCR_TX(port->chan), card);
/* Receive */
sca_outw(HDLC_MAX_MRU, dmac_rx + BFLL, card); /* set buffer length */
sca_out(0x14, DMR_RX(port->chan), card); /* Chain mode, Multi-frame */
sca_out(DIR_EOME, DIR_RX(port->chan), card); /* enable interrupts */
sca_out(DSR_DE, DSR_RX(port->chan), card); /* DMA enable */
/* Transmit */
sca_out(0x14, DMR_TX(port->chan), card); /* Chain mode, Multi-frame */
sca_out(DIR_EOME, DIR_TX(port->chan), card); /* enable interrupts */
sca_set_carrier(port);
netif_napi_add(port->netdev, &port->napi, sca_poll, NAPI_WEIGHT);
}
static inline int sca_intr_status(card_t *card)
{
u8 result = 0;
u8 isr0 = sca_in(ISR0, card);
u8 isr1 = sca_in(ISR1, card);
if (isr1 & 0x03) result |= SCA_INTR_DMAC_RX(0);
if (isr1 & 0x0C) result |= SCA_INTR_DMAC_TX(0);
if (isr1 & 0x30) result |= SCA_INTR_DMAC_RX(1);
if (isr1 & 0xC0) result |= SCA_INTR_DMAC_TX(1);
if (isr0 & 0x0F) result |= SCA_INTR_MSCI(0);
if (isr0 & 0xF0) result |= SCA_INTR_MSCI(1);
if (!(result & SCA_INTR_DMAC_TX(0)))
if (sca_in(DSR_TX(0), card) & DSR_EOM)
result |= SCA_INTR_DMAC_TX(0);
if (!(result & SCA_INTR_DMAC_TX(1)))
if (sca_in(DSR_TX(1), card) & DSR_EOM)
result |= SCA_INTR_DMAC_TX(1);
return result;
}
/* Transmit DMA service */
static inline void sca_tx_done(port_t *port)
{
struct net_device *dev = port->netdev;
card_t* card = port->card;
u8 stat;
unsigned count = 0;
spin_lock(&port->lock);
stat = sca_in(DSR_TX(port->chan), card); /* read DMA Status */
/* Reset DSR status bits */
sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
DSR_TX(port->chan), card);
while (1) {
pkt_desc __iomem *desc = desc_address(port, port->txlast, 1);
u8 stat = readb(&desc->stat);
if (!(stat & ST_TX_OWNRSHP))
break; /* not yet transmitted */
if (stat & ST_TX_UNDRRUN) {
dev->stats.tx_errors++;
dev->stats.tx_fifo_errors++;
} else {
dev->stats.tx_packets++;
dev->stats.tx_bytes += readw(&desc->len);
}
writeb(0, &desc->stat); /* Free descriptor */
count++;
port->txlast = (port->txlast + 1) % card->tx_ring_buffers;
}
if (count)
netif_wake_queue(dev);
spin_unlock(&port->lock);
}
static inline int sca_intr_status(card_t *card)
{
u8 result = 0;
#ifdef __HD64570_H /* HD64570 */
u8 isr0 = sca_in(ISR0, card);
u8 isr1 = sca_in(ISR1, card);
if (isr1 & 0x03) result |= SCA_INTR_DMAC_RX(0);
if (isr1 & 0x0C) result |= SCA_INTR_DMAC_TX(0);
if (isr1 & 0x30) result |= SCA_INTR_DMAC_RX(1);
if (isr1 & 0xC0) result |= SCA_INTR_DMAC_TX(1);
if (isr0 & 0x0F) result |= SCA_INTR_MSCI(0);
if (isr0 & 0xF0) result |= SCA_INTR_MSCI(1);
#else /* HD64572 */
u32 isr0 = sca_inl(ISR0, card);
if (isr0 & 0x0000000F) result |= SCA_INTR_DMAC_RX(0);
if (isr0 & 0x000000F0) result |= SCA_INTR_DMAC_TX(0);
if (isr0 & 0x00000F00) result |= SCA_INTR_DMAC_RX(1);
if (isr0 & 0x0000F000) result |= SCA_INTR_DMAC_TX(1);
if (isr0 & 0x003E0000) result |= SCA_INTR_MSCI(0);
if (isr0 & 0x3E000000) result |= SCA_INTR_MSCI(1);
#endif /* HD64570 vs HD64572 */
if (!(result & SCA_INTR_DMAC_TX(0)))
if (sca_in(DSR_TX(0), card) & DSR_EOM)
result |= SCA_INTR_DMAC_TX(0);
if (!(result & SCA_INTR_DMAC_TX(1)))
if (sca_in(DSR_TX(1), card) & DSR_EOM)
result |= SCA_INTR_DMAC_TX(1);
return result;
}
static void sca_init_port(port_t *port)
{
card_t *card = port_to_card(port);
int transmit, i;
port->rxin = 0;
port->txin = 0;
port->txlast = 0;
#ifndef PAGE0_ALWAYS_MAPPED
openwin(card, 0);
#endif
for (transmit = 0; transmit < 2; transmit++) {
u16 dmac = transmit ? get_dmac_tx(port) : get_dmac_rx(port);
u16 buffs = transmit ? card->tx_ring_buffers
: card->rx_ring_buffers;
for (i = 0; i < buffs; i++) {
pkt_desc __iomem *desc = desc_address(port, i, transmit);
u16 chain_off = desc_offset(port, i + 1, transmit);
u32 buff_off = buffer_offset(port, i, transmit);
writew(chain_off, &desc->cp);
writel(buff_off, &desc->bp);
writew(0, &desc->len);
writeb(0, &desc->stat);
}
/* DMA disable - to halt state */
sca_out(0, transmit ? DSR_TX(phy_node(port)) :
DSR_RX(phy_node(port)), card);
/* software ABORT - to initial state */
sca_out(DCR_ABORT, transmit ? DCR_TX(phy_node(port)) :
DCR_RX(phy_node(port)), card);
/* current desc addr */
sca_out(0, dmac + CPB, card); /* pointer base */
sca_outw(desc_offset(port, 0, transmit), dmac + CDAL, card);
if (!transmit)
sca_outw(desc_offset(port, buffs - 1, transmit),
dmac + EDAL, card);
else
sca_outw(desc_offset(port, 0, transmit), dmac + EDAL,
card);
/* clear frame end interrupt counter */
sca_out(DCR_CLEAR_EOF, transmit ? DCR_TX(phy_node(port)) :
DCR_RX(phy_node(port)), card);
if (!transmit) { /* Receive */
/* set buffer length */
sca_outw(HDLC_MAX_MRU, dmac + BFLL, card);
/* Chain mode, Multi-frame */
sca_out(0x14, DMR_RX(phy_node(port)), card);
sca_out(DIR_EOME | DIR_BOFE, DIR_RX(phy_node(port)),
card);
/* DMA enable */
sca_out(DSR_DE, DSR_RX(phy_node(port)), card);
} else { /* Transmit */
/* Chain mode, Multi-frame */
sca_out(0x14, DMR_TX(phy_node(port)), card);
/* enable underflow interrupts */
sca_out(DIR_BOFE, DIR_TX(phy_node(port)), card);
}
}
sca_set_carrier(port);
}
static void sca_init_port(port_t *port)
{
card_t *card = port_to_card(port);
int transmit, i;
port->rxin = 0;
port->txin = 0;
port->txlast = 0;
#ifndef PAGE0_ALWAYS_MAPPED
openwin(card, 0);
#endif
for (transmit = 0; transmit < 2; transmit++) {
u16 dmac = transmit ? get_dmac_tx(port) : get_dmac_rx(port);
u16 buffs = transmit ? card->tx_ring_buffers
: card->rx_ring_buffers;
for (i = 0; i < buffs; i++) {
pkt_desc __iomem *desc = desc_address(port, i, transmit);
u16 chain_off = desc_offset(port, i + 1, transmit);
u32 buff_off = buffer_offset(port, i, transmit);
writew(chain_off, &desc->cp);
writel(buff_off, &desc->bp);
writew(0, &desc->len);
writeb(0, &desc->stat);
}
sca_out(0, transmit ? DSR_TX(phy_node(port)) :
DSR_RX(phy_node(port)), card);
sca_out(DCR_ABORT, transmit ? DCR_TX(phy_node(port)) :
DCR_RX(phy_node(port)), card);
sca_out(0, dmac + CPB, card);
sca_outw(desc_offset(port, 0, transmit), dmac + CDAL, card);
if (!transmit)
sca_outw(desc_offset(port, buffs - 1, transmit),
dmac + EDAL, card);
else
sca_outw(desc_offset(port, 0, transmit), dmac + EDAL,
card);
sca_out(DCR_CLEAR_EOF, transmit ? DCR_TX(phy_node(port)) :
DCR_RX(phy_node(port)), card);
if (!transmit) {
sca_outw(HDLC_MAX_MRU, dmac + BFLL, card);
sca_out(0x14, DMR_RX(phy_node(port)), card);
sca_out(DIR_EOME | DIR_BOFE, DIR_RX(phy_node(port)),
card);
sca_out(DSR_DE, DSR_RX(phy_node(port)), card);
} else {
sca_out(0x14, DMR_TX(phy_node(port)), card);
sca_out(DIR_BOFE, DIR_TX(phy_node(port)), card);
}
}
sca_set_carrier(port);
}