static int cpmac_mdio_read(struct mii_bus *bus, int phy_id, int reg)
{
u32 val;
while (cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0)) & MDIO_BUSY)
cpu_relax();
cpmac_write(bus->priv, CPMAC_MDIO_ACCESS(0), MDIO_BUSY | MDIO_REG(reg) |
MDIO_PHY(phy_id));
while ((val = cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0))) & MDIO_BUSY)
cpu_relax();
return MDIO_DATA(val);
}
static irqreturn_t cpmac_irq(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct cpmac_priv *priv;
int queue;
u32 status;
priv = netdev_priv(dev);
status = cpmac_read(priv->regs, CPMAC_MAC_INT_VECTOR);
if (unlikely(netif_msg_intr(priv)))
printk(KERN_DEBUG "%s: interrupt status: 0x%08x\n", dev->name,
status);
if (status & MAC_INT_TX)
cpmac_end_xmit(dev, (status & 7));
if (status & MAC_INT_RX) {
queue = (status >> 8) & 7;
if (netif_rx_schedule_prep(dev, &priv->napi)) {
cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 1 << queue);
__netif_rx_schedule(dev, &priv->napi);
}
}
static void cpmac_check_status(struct net_device *dev)
{
struct cpmac_priv *priv = netdev_priv(dev);
u32 macstatus = cpmac_read(priv->regs, CPMAC_MAC_STATUS);
int rx_channel = (macstatus >> 8) & 7;
int rx_code = (macstatus >> 12) & 15;
int tx_channel = (macstatus >> 16) & 7;
int tx_code = (macstatus >> 20) & 15;
if (rx_code || tx_code) {
if (netif_msg_drv(priv) && net_ratelimit()) {
/* Can't find any documentation on what these
*error codes actually are. So just log them and hope..
*/
if (rx_code)
printk(KERN_WARNING "%s: host error %d on rx "
"channel %d (macstatus %08x), resetting\n",
dev->name, rx_code, rx_channel, macstatus);
if (tx_code)
printk(KERN_WARNING "%s: host error %d on tx "
"channel %d (macstatus %08x), resetting\n",
dev->name, tx_code, tx_channel, macstatus);
}
netif_tx_stop_all_queues(dev);
cpmac_hw_stop(dev);
if (schedule_work(&priv->reset_work))
atomic_inc(&priv->reset_pending);
if (unlikely(netif_msg_hw(priv)))
cpmac_dump_regs(dev);
}
cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff);
}
static int cpmac_mdio_write(struct mii_bus *bus, int phy_id,
int reg, u16 val)
{
while (cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0)) & MDIO_BUSY)
cpu_relax();
cpmac_write(bus->priv, CPMAC_MDIO_ACCESS(0), MDIO_BUSY | MDIO_WRITE |
MDIO_REG(reg) | MDIO_PHY(phy_id) | MDIO_DATA(val));
return 0;
}
static void cpmac_hw_start()
{
int i;
//struct cpmac_priv *priv = netdev_priv(dev);
//struct plat_cpmac_data *pdata = dev_get_platdata(&priv->pdev->dev);
ar7_device_reset(pdata.reset_bit);
//for (i = 0; i < 8; i++) {
cpmac_write(CPMAC_TX_PTR(i), 0);
lock_s(synthlock_0);
cpmac_write_CPMAC_RX_PTR(i, 0);
//}
cpmac_write_CPMAC_RX_PTR(0, rx_head->mapping);
cpmac_write(CPMAC_MBP, MBP_RXSHORT | MBP_RXBCAST |
MBP_RXMCAST);
cpmac_write(CPMAC_BUFFER_OFFSET, 0);
//for (i = 0; i < 8; i++)
cpmac_write(CPMAC_MAC_ADDR_LO(i), netdev.dev_addr[5]);
cpmac_write(CPMAC_MAC_ADDR_MID, netdev.dev_addr[4]);
cpmac_write(CPMAC_MAC_ADDR_HI, netdev.dev_addr[0] |
(netdev.dev_addr[1] << 8) | (netdev.dev_addr[2] << 16) |
(netdev.dev_addr[3] << 24));
cpmac_write(CPMAC_MAX_LENGTH, CPMAC_SKB_SIZE);
cpmac_write(CPMAC_UNICAST_CLEAR, 0xff);
cpmac_write(CPMAC_RX_INT_CLEAR, 0xff);
cpmac_write(CPMAC_TX_INT_CLEAR, 0xff);
cpmac_write(CPMAC_MAC_INT_CLEAR, 0xff);
cpmac_write(CPMAC_UNICAST_ENABLE, 1);
cpmac_write(CPMAC_RX_INT_ENABLE, 1);
cpmac_write(CPMAC_TX_INT_ENABLE, 0xff);
cpmac_write(CPMAC_MAC_INT_ENABLE, 3);
cpmac_write(CPMAC_RX_CONTROL,
cpmac_read(CPMAC_RX_CONTROL) | 1);
cpmac_write(CPMAC_TX_CONTROL,
cpmac_read(CPMAC_TX_CONTROL) | 1);
cpmac_write(CPMAC_MAC_CONTROL,
cpmac_read(CPMAC_MAC_CONTROL) | MAC_MII |
MAC_FDX);
unlock_s(synthlock_0);
}
static void cpmac_hw_start(struct net_device *dev)
{
int i;
struct cpmac_priv *priv = netdev_priv(dev);
struct plat_cpmac_data *pdata = priv->pdev->dev.platform_data;
ar7_device_reset(pdata->reset_bit);
for (i = 0; i < 8; i++) {
cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0);
cpmac_write(priv->regs, CPMAC_RX_PTR(i), 0);
}
cpmac_write(priv->regs, CPMAC_RX_PTR(0), priv->rx_head->mapping);
cpmac_write(priv->regs, CPMAC_MBP, MBP_RXSHORT | MBP_RXBCAST |
MBP_RXMCAST);
cpmac_write(priv->regs, CPMAC_BUFFER_OFFSET, 0);
for (i = 0; i < 8; i++)
cpmac_write(priv->regs, CPMAC_MAC_ADDR_LO(i), dev->dev_addr[5]);
cpmac_write(priv->regs, CPMAC_MAC_ADDR_MID, dev->dev_addr[4]);
cpmac_write(priv->regs, CPMAC_MAC_ADDR_HI, dev->dev_addr[0] |
(dev->dev_addr[1] << 8) | (dev->dev_addr[2] << 16) |
(dev->dev_addr[3] << 24));
cpmac_write(priv->regs, CPMAC_MAX_LENGTH, CPMAC_SKB_SIZE);
cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff);
cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff);
cpmac_write(priv->regs, CPMAC_TX_INT_CLEAR, 0xff);
cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff);
cpmac_write(priv->regs, CPMAC_UNICAST_ENABLE, 1);
cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1);
cpmac_write(priv->regs, CPMAC_TX_INT_ENABLE, 0xff);
cpmac_write(priv->regs, CPMAC_MAC_INT_ENABLE, 3);
cpmac_write(priv->regs, CPMAC_RX_CONTROL,
cpmac_read(priv->regs, CPMAC_RX_CONTROL) | 1);
cpmac_write(priv->regs, CPMAC_TX_CONTROL,
cpmac_read(priv->regs, CPMAC_TX_CONTROL) | 1);
cpmac_write(priv->regs, CPMAC_MAC_CONTROL,
cpmac_read(priv->regs, CPMAC_MAC_CONTROL) | MAC_MII |
MAC_FDX);
}
static void cpmac_hw_stop(/*struct net_device *dev*/)
{
int i;
//struct cpmac_priv *priv = netdev_priv(dev);
//struct plat_cpmac_data *pdata = dev_get_platdata(&priv->pdev->dev);
ar7_device_reset(pdata.reset_bit);
cpmac_write(CPMAC_RX_CONTROL,
cpmac_read(CPMAC_RX_CONTROL) & ~1);
cpmac_write(CPMAC_TX_CONTROL,
cpmac_read(CPMAC_TX_CONTROL) & ~1);
//for (i = 0; i < 8; i++) {
cpmac_write(CPMAC_TX_PTR(i), 0);
cpmac_write_CPMAC_RX_PTR(i, 0);
//}
cpmac_write(CPMAC_UNICAST_CLEAR, 0xff);
cpmac_write(CPMAC_RX_INT_CLEAR, 0xff);
cpmac_write(CPMAC_TX_INT_CLEAR, 0xff);
cpmac_write(CPMAC_MAC_INT_CLEAR, 0xff);
cpmac_write(CPMAC_MAC_CONTROL,
cpmac_read(CPMAC_MAC_CONTROL) & ~MAC_MII);
}
static void cpmac_hw_stop(struct net_device *dev)
{
int i;
struct cpmac_priv *priv = netdev_priv(dev);
struct plat_cpmac_data *pdata = priv->pdev->dev.platform_data;
ar7_device_reset(pdata->reset_bit);
cpmac_write(priv->regs, CPMAC_RX_CONTROL,
cpmac_read(priv->regs, CPMAC_RX_CONTROL) & ~1);
cpmac_write(priv->regs, CPMAC_TX_CONTROL,
cpmac_read(priv->regs, CPMAC_TX_CONTROL) & ~1);
for (i = 0; i < 8; i++) {
cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0);
cpmac_write(priv->regs, CPMAC_RX_PTR(i), 0);
}
cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff);
cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff);
cpmac_write(priv->regs, CPMAC_TX_INT_CLEAR, 0xff);
cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff);
cpmac_write(priv->regs, CPMAC_MAC_CONTROL,
cpmac_read(priv->regs, CPMAC_MAC_CONTROL) & ~MAC_MII);
}
static void cpmac_dump_regs(struct net_device *dev)
{
int i;
struct cpmac_priv *priv = netdev_priv(dev);
for (i = 0; i < CPMAC_REG_END; i += 4) {
if (i % 16 == 0) {
if (i)
pr_cont("\n");
printk(KERN_DEBUG "%s: reg[%p]:", dev->name,
priv->regs + i);
}
printk(" %08x", cpmac_read(priv->regs, i));
}
printk("\n");
}
static void cpmac_set_multicast_list(struct net_device *dev)
{
struct dev_mc_list *iter;
int i;
u8 tmp;
u32 mbp, bit, hash[2] = { 0, };
struct cpmac_priv *priv = netdev_priv(dev);
mbp = cpmac_read(priv->regs, CPMAC_MBP);
if (dev->flags & IFF_PROMISC) {
cpmac_write(priv->regs, CPMAC_MBP, (mbp & ~MBP_PROMISCCHAN(0)) |
MBP_RXPROMISC);
} else {
cpmac_write(priv->regs, CPMAC_MBP, mbp & ~MBP_RXPROMISC);
if (dev->flags & IFF_ALLMULTI) {
/* enable all multicast mode */
cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, 0xffffffff);
cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, 0xffffffff);
} else {
/*
* cpmac uses some strange mac address hashing
* (not crc32)
*/
for (i = 0, iter = dev->mc_list; i < dev->mc_count;
i++, iter = iter->next) {
bit = 0;
tmp = iter->dmi_addr[0];
bit ^= (tmp >> 2) ^ (tmp << 4);
tmp = iter->dmi_addr[1];
bit ^= (tmp >> 4) ^ (tmp << 2);
tmp = iter->dmi_addr[2];
bit ^= (tmp >> 6) ^ tmp;
tmp = iter->dmi_addr[3];
bit ^= (tmp >> 2) ^ (tmp << 4);
tmp = iter->dmi_addr[4];
bit ^= (tmp >> 4) ^ (tmp << 2);
tmp = iter->dmi_addr[5];
bit ^= (tmp >> 6) ^ tmp;
bit &= 0x3f;
hash[bit / 32] |= 1 << (bit % 32);
}
cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, hash[0]);
cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, hash[1]);
}
}
}
static void cpmac_set_multicast_list(struct net_device *dev)
{
struct netdev_hw_addr *ha;
u8 tmp;
u32 mbp, bit, hash[2] = { 0, };
struct cpmac_priv *priv = netdev_priv(dev);
mbp = cpmac_read(priv->regs, CPMAC_MBP);
if (dev->flags & IFF_PROMISC) {
cpmac_write(priv->regs, CPMAC_MBP, (mbp & ~MBP_PROMISCCHAN(0)) |
MBP_RXPROMISC);
} else {
cpmac_write(priv->regs, CPMAC_MBP, mbp & ~MBP_RXPROMISC);
if (dev->flags & IFF_ALLMULTI) {
cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, 0xffffffff);
cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, 0xffffffff);
} else {
netdev_for_each_mc_addr(ha, dev) {
bit = 0;
tmp = ha->addr[0];
bit ^= (tmp >> 2) ^ (tmp << 4);
tmp = ha->addr[1];
bit ^= (tmp >> 4) ^ (tmp << 2);
tmp = ha->addr[2];
bit ^= (tmp >> 6) ^ tmp;
tmp = ha->addr[3];
bit ^= (tmp >> 2) ^ (tmp << 4);
tmp = ha->addr[4];
bit ^= (tmp >> 4) ^ (tmp << 2);
tmp = ha->addr[5];
bit ^= (tmp >> 6) ^ tmp;
bit &= 0x3f;
hash[bit / 32] |= 1 << (bit % 32);
}
cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, hash[0]);
cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, hash[1]);
}
}
static int cpmac_poll(struct napi_struct *napi, int budget)
{
struct sk_buff *skb;
struct cpmac_desc *desc, *restart;
struct cpmac_priv *priv = container_of(napi, struct cpmac_priv, napi);
int received = 0, processed = 0;
spin_lock(&priv->rx_lock);
if (unlikely(!priv->rx_head)) {
if (netif_msg_rx_err(priv) && net_ratelimit())
printk(KERN_WARNING "%s: rx: polling, but no queue\n",
priv->dev->name);
spin_unlock(&priv->rx_lock);
netif_rx_complete(priv->dev, napi);
return 0;
}
desc = priv->rx_head;
restart = NULL;
while (((desc->dataflags & CPMAC_OWN) == 0) && (received < budget)) {
processed++;
if ((desc->dataflags & CPMAC_EOQ) != 0) {
/* The last update to eoq->hw_next didn't happen
* soon enough, and the receiver stopped here.
*Remember this descriptor so we can restart
* the receiver after freeing some space.
*/
if (unlikely(restart)) {
if (netif_msg_rx_err(priv))
printk(KERN_ERR "%s: poll found a"
" duplicate EOQ: %p and %p\n",
priv->dev->name, restart, desc);
goto fatal_error;
}
restart = desc->next;
}
skb = cpmac_rx_one(priv, desc);
if (likely(skb)) {
netif_receive_skb(skb);
received++;
}
desc = desc->next;
}
if (desc != priv->rx_head) {
/* We freed some buffers, but not the whole ring,
* add what we did free to the rx list */
desc->prev->hw_next = (u32)0;
priv->rx_head->prev->hw_next = priv->rx_head->mapping;
}
/* Optimization: If we did not actually process an EOQ (perhaps because
* of quota limits), check to see if the tail of the queue has EOQ set.
* We should immediately restart in that case so that the receiver can
* restart and run in parallel with more packet processing.
* This lets us handle slightly larger bursts before running
* out of ring space (assuming dev->weight < ring_size) */
if (!restart &&
(priv->rx_head->prev->dataflags & (CPMAC_OWN|CPMAC_EOQ))
== CPMAC_EOQ &&
(priv->rx_head->dataflags & CPMAC_OWN) != 0) {
/* reset EOQ so the poll loop (above) doesn't try to
* restart this when it eventually gets to this descriptor.
*/
priv->rx_head->prev->dataflags &= ~CPMAC_EOQ;
restart = priv->rx_head;
}
if (restart) {
priv->dev->stats.rx_errors++;
priv->dev->stats.rx_fifo_errors++;
if (netif_msg_rx_err(priv) && net_ratelimit())
printk(KERN_WARNING "%s: rx dma ring overrun\n",
priv->dev->name);
if (unlikely((restart->dataflags & CPMAC_OWN) == 0)) {
if (netif_msg_drv(priv))
printk(KERN_ERR "%s: cpmac_poll is trying to "
"restart rx from a descriptor that's "
"not free: %p\n",
priv->dev->name, restart);
goto fatal_error;
}
cpmac_write(priv->regs, CPMAC_RX_PTR(0), restart->mapping);
}
priv->rx_head = desc;
spin_unlock(&priv->rx_lock);
if (unlikely(netif_msg_rx_status(priv)))
printk(KERN_DEBUG "%s: poll processed %d packets\n",
priv->dev->name, received);
if (processed == 0) {
/* we ran out of packets to read,
* revert to interrupt-driven mode */
netif_rx_complete(priv->dev, napi);
cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1);
return 0;
}
return 1;
fatal_error:
/* Something went horribly wrong.
* Reset hardware to try to recover rather than wedging. */
if (netif_msg_drv(priv)) {
printk(KERN_ERR "%s: cpmac_poll is confused. "
"Resetting hardware\n", priv->dev->name);
cpmac_dump_all_desc(priv->dev);
printk(KERN_DEBUG "%s: RX_PTR(0)=0x%08x RX_ACK(0)=0x%08x\n",
priv->dev->name,
cpmac_read(priv->regs, CPMAC_RX_PTR(0)),
cpmac_read(priv->regs, CPMAC_RX_ACK(0)));
}
spin_unlock(&priv->rx_lock);
netif_rx_complete(priv->dev, napi);
netif_tx_stop_all_queues(priv->dev);
napi_disable(&priv->napi);
atomic_inc(&priv->reset_pending);
cpmac_hw_stop(priv->dev);
if (!schedule_work(&priv->reset_work))
atomic_dec(&priv->reset_pending);
return 0;
}
