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path: root/drivers/net/wan/hd64570.c
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Diffstat (limited to 'drivers/net/wan/hd64570.c')
-rw-r--r--drivers/net/wan/hd64570.c124
1 files changed, 66 insertions, 58 deletions
diff --git a/drivers/net/wan/hd64570.c b/drivers/net/wan/hd64570.c
index 058e48182838..0d19e39fec86 100644
--- a/drivers/net/wan/hd64570.c
+++ b/drivers/net/wan/hd64570.c
@@ -47,7 +47,6 @@
#define SCA_INTR_DMAC_RX(node) (node ? 0x20 : 0x02)
#define SCA_INTR_DMAC_TX(node) (node ? 0x40 : 0x04)
-
static inline struct net_device *port_to_dev(port_t *port)
{
return port->dev;
@@ -59,12 +58,18 @@ static inline int sca_intr_status(card_t *card)
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 (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)
@@ -76,7 +81,7 @@ static inline int sca_intr_status(card_t *card)
return result;
}
-static inline port_t* dev_to_port(struct net_device *dev)
+static inline port_t *dev_to_port(struct net_device *dev)
{
return dev_to_hdlc(dev)->priv;
}
@@ -87,7 +92,6 @@ static inline u16 next_desc(port_t *port, u16 desc, int transmit)
: port_to_card(port)->rx_ring_buffers);
}
-
static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
{
u16 rx_buffs = port_to_card(port)->rx_ring_buffers;
@@ -98,14 +102,12 @@ static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
transmit * rx_buffs + desc;
}
-
static inline u16 desc_offset(port_t *port, u16 desc, int transmit)
{
/* Descriptor offset always fits in 16 bits */
return desc_abs_number(port, desc, transmit) * sizeof(pkt_desc);
}
-
static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc,
int transmit)
{
@@ -118,14 +120,12 @@ static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc,
#endif
}
-
static inline u32 buffer_offset(port_t *port, u16 desc, int transmit)
{
return port_to_card(port)->buff_offset +
desc_abs_number(port, desc, transmit) * (u32)HDLC_MAX_MRU;
}
-
static inline void sca_set_carrier(port_t *port)
{
if (!(sca_in(get_msci(port) + ST3, port_to_card(port)) & ST3_DCD)) {
@@ -143,7 +143,6 @@ static inline void sca_set_carrier(port_t *port)
}
}
-
static void sca_init_port(port_t *port)
{
card_t *card = port_to_card(port);
@@ -213,13 +212,12 @@ static void sca_init_port(port_t *port)
sca_set_carrier(port);
}
-
#ifdef NEED_SCA_MSCI_INTR
/* MSCI interrupt service */
static inline void sca_msci_intr(port_t *port)
{
u16 msci = get_msci(port);
- card_t* card = port_to_card(port);
+ card_t *card = port_to_card(port);
u8 stat = sca_in(msci + ST1, card); /* read MSCI ST1 status */
/* Reset MSCI TX underrun and CDCD status bit */
@@ -236,7 +234,6 @@ static inline void sca_msci_intr(port_t *port)
}
#endif
-
static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc,
u16 rxin)
{
@@ -265,8 +262,9 @@ static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc,
memcpy_fromio(skb->data, winbase(card) + buff, maxlen);
openwin(card, page + 1);
memcpy_fromio(skb->data + maxlen, winbase(card), len - maxlen);
- } else
+ } else {
memcpy_fromio(skb->data, winbase(card) + buff, len);
+ }
#ifndef PAGE0_ALWAYS_MAPPED
openwin(card, 0); /* select pkt_desc table page back */
@@ -282,7 +280,6 @@ static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc,
netif_rx(skb);
}
-
/* Receive DMA interrupt service */
static inline void sca_rx_intr(port_t *port)
{
@@ -304,7 +301,7 @@ static inline void sca_rx_intr(port_t *port)
pkt_desc __iomem *desc;
u32 cda = sca_inw(dmac + CDAL, card);
- if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
+ if (cda >= desc_off && (cda < desc_off + sizeof(pkt_desc)))
break; /* No frame received */
desc = desc_address(port, port->rxin, 0);
@@ -322,8 +319,9 @@ static inline void sca_rx_intr(port_t *port)
dev->stats.rx_crc_errors++;
if (stat & ST_RX_EOM)
port->rxpart = 0; /* received last fragment */
- } else
+ } else {
sca_rx(card, port, desc, port->rxin);
+ }
/* Set new error descriptor address */
sca_outw(desc_off, dmac + EDAL, card);
@@ -334,13 +332,12 @@ static inline void sca_rx_intr(port_t *port)
sca_out(DSR_DE, DSR_RX(phy_node(port)), card);
}
-
/* 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);
+ card_t *card = port_to_card(port);
u8 stat;
spin_lock(&port->lock);
@@ -356,7 +353,8 @@ static inline void sca_tx_intr(port_t *port)
u32 desc_off = desc_offset(port, port->txlast, 1);
u32 cda = sca_inw(dmac + CDAL, card);
- if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
+
+ 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);
@@ -370,8 +368,7 @@ static inline void sca_tx_intr(port_t *port)
spin_unlock(&port->lock);
}
-
-static irqreturn_t sca_intr(int irq, void* dev_id)
+static irqreturn_t sca_intr(int irq, void *dev_id)
{
card_t *card = dev_id;
int i;
@@ -379,10 +376,11 @@ static irqreturn_t sca_intr(int irq, void* dev_id)
int handled = 0;
u8 page = sca_get_page(card);
- while((stat = sca_intr_status(card)) != 0) {
+ while ((stat = sca_intr_status(card)) != 0) {
handled = 1;
for (i = 0; i < 2; i++) {
port_t *port = get_port(card, i);
+
if (port) {
if (stat & SCA_INTR_MSCI(i))
sca_msci_intr(port);
@@ -400,15 +398,13 @@ static irqreturn_t sca_intr(int irq, void* dev_id)
return IRQ_RETVAL(handled);
}
-
static void sca_set_port(port_t *port)
{
- card_t* card = port_to_card(port);
+ card_t *card = port_to_card(port);
u16 msci = get_msci(port);
u8 md2 = sca_in(msci + MD2, card);
unsigned int tmc, br = 10, brv = 1024;
-
if (port->settings.clock_rate > 0) {
/* Try lower br for better accuracy*/
do {
@@ -417,14 +413,15 @@ static void sca_set_port(port_t *port)
/* Baud Rate = CLOCK_BASE / TMC / 2^BR */
tmc = CLOCK_BASE / brv / port->settings.clock_rate;
- }while (br > 1 && tmc <= 128);
+ } while (br > 1 && tmc <= 128);
if (tmc < 1) {
tmc = 1;
br = 0; /* For baud=CLOCK_BASE we use tmc=1 br=0 */
brv = 1;
- } else if (tmc > 255)
+ } else if (tmc > 255) {
tmc = 256; /* tmc=0 means 256 - low baud rates */
+ }
port->settings.clock_rate = CLOCK_BASE / brv / tmc;
} else {
@@ -450,34 +447,50 @@ static void sca_set_port(port_t *port)
md2 &= ~MD2_LOOPBACK;
sca_out(md2, msci + MD2, card);
-
}
-
static void sca_open(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
- card_t* card = port_to_card(port);
+ card_t *card = port_to_card(port);
u16 msci = get_msci(port);
u8 md0, md2;
- switch(port->encoding) {
- case ENCODING_NRZ: md2 = MD2_NRZ; break;
- case ENCODING_NRZI: md2 = MD2_NRZI; break;
- case ENCODING_FM_MARK: md2 = MD2_FM_MARK; break;
- case ENCODING_FM_SPACE: md2 = MD2_FM_SPACE; break;
- default: md2 = MD2_MANCHESTER;
+ switch (port->encoding) {
+ case ENCODING_NRZ:
+ md2 = MD2_NRZ;
+ break;
+ case ENCODING_NRZI:
+ md2 = MD2_NRZI;
+ break;
+ case ENCODING_FM_MARK:
+ md2 = MD2_FM_MARK;
+ break;
+ case ENCODING_FM_SPACE:
+ md2 = MD2_FM_SPACE;
+ break;
+ default:
+ md2 = MD2_MANCHESTER;
}
if (port->settings.loopback)
md2 |= MD2_LOOPBACK;
- switch(port->parity) {
- case PARITY_CRC16_PR0: md0 = MD0_HDLC | MD0_CRC_16_0; break;
- case PARITY_CRC16_PR1: md0 = MD0_HDLC | MD0_CRC_16; break;
- case PARITY_CRC16_PR0_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU_0; break;
- case PARITY_CRC16_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU; break;
- default: md0 = MD0_HDLC | MD0_CRC_NONE;
+ switch (port->parity) {
+ case PARITY_CRC16_PR0:
+ md0 = MD0_HDLC | MD0_CRC_16_0;
+ break;
+ case PARITY_CRC16_PR1:
+ md0 = MD0_HDLC | MD0_CRC_16;
+ break;
+ case PARITY_CRC16_PR0_CCITT:
+ md0 = MD0_HDLC | MD0_CRC_ITU_0;
+ break;
+ case PARITY_CRC16_PR1_CCITT:
+ md0 = MD0_HDLC | MD0_CRC_ITU;
+ break;
+ default:
+ md0 = MD0_HDLC | MD0_CRC_NONE;
}
sca_out(CMD_RESET, msci + CMD, card);
@@ -494,9 +507,9 @@ static void sca_open(struct net_device *dev)
sca_out(0x14, msci + TRC1, card); /* +1=TXRDY/DMA deactiv condition */
/* We're using the following interrupts:
- - TXINT (DMAC completed all transmisions, underrun or DCD change)
- - all DMA interrupts
-*/
+ * - TXINT (DMAC completed all transmisions, underrun or DCD change)
+ * - all DMA interrupts
+ */
sca_set_carrier(port);
/* MSCI TX INT and RX INT A IRQ enable */
@@ -517,11 +530,10 @@ static void sca_open(struct net_device *dev)
netif_start_queue(dev);
}
-
static void sca_close(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
- card_t* card = port_to_card(port);
+ card_t *card = port_to_card(port);
/* reset channel */
sca_out(CMD_RESET, get_msci(port) + CMD, port_to_card(port));
@@ -535,7 +547,6 @@ static void sca_close(struct net_device *dev)
netif_stop_queue(dev);
}
-
static int sca_attach(struct net_device *dev, unsigned short encoding,
unsigned short parity)
{
@@ -558,7 +569,6 @@ static int sca_attach(struct net_device *dev, unsigned short encoding,
return 0;
}
-
#ifdef DEBUG_RINGS
static void sca_dump_rings(struct net_device *dev)
{
@@ -613,7 +623,6 @@ static void sca_dump_rings(struct net_device *dev)
}
#endif /* DEBUG_RINGS */
-
static netdev_tx_t sca_xmit(struct sk_buff *skb, struct net_device *dev)
{
port_t *port = dev_to_port(dev);
@@ -645,8 +654,9 @@ static netdev_tx_t sca_xmit(struct sk_buff *skb, struct net_device *dev)
memcpy_toio(winbase(card) + buff, skb->data, maxlen);
openwin(card, page + 1);
memcpy_toio(winbase(card), skb->data + maxlen, len - maxlen);
- } else
+ } else {
memcpy_toio(winbase(card) + buff, skb->data, len);
+ }
#ifndef PAGE0_ALWAYS_MAPPED
openwin(card, 0); /* select pkt_desc table page back */
@@ -670,7 +680,6 @@ static netdev_tx_t sca_xmit(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK;
}
-
#ifdef NEED_DETECT_RAM
static u32 sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize)
{
@@ -699,7 +708,6 @@ static u32 sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize)
}
#endif /* NEED_DETECT_RAM */
-
static void sca_init(card_t *card, int wait_states)
{
sca_out(wait_states, WCRL, card); /* Wait Control */
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-22 22:16:54 +0300