diff options
Diffstat (limited to 'drivers/net/ethernet/sun/sunqe.c')
| -rw-r--r-- | drivers/net/ethernet/sun/sunqe.c | 1007 |
1 files changed, 1007 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sun/sunqe.c b/drivers/net/ethernet/sun/sunqe.c new file mode 100644 index 00000000000..b28f74367eb --- /dev/null +++ b/drivers/net/ethernet/sun/sunqe.c @@ -0,0 +1,1007 @@ +/* sunqe.c: Sparc QuadEthernet 10baseT SBUS card driver. + * Once again I am out to prove that every ethernet + * controller out there can be most efficiently programmed + * if you make it look like a LANCE. + * + * Copyright (C) 1996, 1999, 2003, 2006, 2008 David S. Miller (davem@davemloft.net) + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/fcntl.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/in.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/crc32.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/ethtool.h> +#include <linux/bitops.h> +#include <linux/dma-mapping.h> +#include <linux/of.h> +#include <linux/of_device.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/dma.h> +#include <asm/byteorder.h> +#include <asm/idprom.h> +#include <asm/openprom.h> +#include <asm/oplib.h> +#include <asm/auxio.h> +#include <asm/pgtable.h> +#include <asm/irq.h> + +#include "sunqe.h" + +#define DRV_NAME "sunqe" +#define DRV_VERSION "4.1" +#define DRV_RELDATE "August 27, 2008" +#define DRV_AUTHOR "David S. Miller (davem@davemloft.net)" + +static char version[] = + DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n"; + +MODULE_VERSION(DRV_VERSION); +MODULE_AUTHOR(DRV_AUTHOR); +MODULE_DESCRIPTION("Sun QuadEthernet 10baseT SBUS card driver"); +MODULE_LICENSE("GPL"); + +static struct sunqec *root_qec_dev; + +static void qe_set_multicast(struct net_device *dev); + +#define QEC_RESET_TRIES 200 + +static inline int qec_global_reset(void __iomem *gregs) +{ + int tries = QEC_RESET_TRIES; + + sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL); + while (--tries) { + u32 tmp = sbus_readl(gregs + GLOB_CTRL); + if (tmp & GLOB_CTRL_RESET) { + udelay(20); + continue; + } + break; + } + if (tries) + return 0; + printk(KERN_ERR "QuadEther: AIEEE cannot reset the QEC!\n"); + return -1; +} + +#define MACE_RESET_RETRIES 200 +#define QE_RESET_RETRIES 200 + +static inline int qe_stop(struct sunqe *qep) +{ + void __iomem *cregs = qep->qcregs; + void __iomem *mregs = qep->mregs; + int tries; + + /* Reset the MACE, then the QEC channel. */ + sbus_writeb(MREGS_BCONFIG_RESET, mregs + MREGS_BCONFIG); + tries = MACE_RESET_RETRIES; + while (--tries) { + u8 tmp = sbus_readb(mregs + MREGS_BCONFIG); + if (tmp & MREGS_BCONFIG_RESET) { + udelay(20); + continue; + } + break; + } + if (!tries) { + printk(KERN_ERR "QuadEther: AIEEE cannot reset the MACE!\n"); + return -1; + } + + sbus_writel(CREG_CTRL_RESET, cregs + CREG_CTRL); + tries = QE_RESET_RETRIES; + while (--tries) { + u32 tmp = sbus_readl(cregs + CREG_CTRL); + if (tmp & CREG_CTRL_RESET) { + udelay(20); + continue; + } + break; + } + if (!tries) { + printk(KERN_ERR "QuadEther: Cannot reset QE channel!\n"); + return -1; + } + return 0; +} + +static void qe_init_rings(struct sunqe *qep) +{ + struct qe_init_block *qb = qep->qe_block; + struct sunqe_buffers *qbufs = qep->buffers; + __u32 qbufs_dvma = qep->buffers_dvma; + int i; + + qep->rx_new = qep->rx_old = qep->tx_new = qep->tx_old = 0; + memset(qb, 0, sizeof(struct qe_init_block)); + memset(qbufs, 0, sizeof(struct sunqe_buffers)); + for (i = 0; i < RX_RING_SIZE; i++) { + qb->qe_rxd[i].rx_addr = qbufs_dvma + qebuf_offset(rx_buf, i); + qb->qe_rxd[i].rx_flags = + (RXD_OWN | ((RXD_PKT_SZ) & RXD_LENGTH)); + } +} + +static int qe_init(struct sunqe *qep, int from_irq) +{ + struct sunqec *qecp = qep->parent; + void __iomem *cregs = qep->qcregs; + void __iomem *mregs = qep->mregs; + void __iomem *gregs = qecp->gregs; + unsigned char *e = &qep->dev->dev_addr[0]; + u32 tmp; + int i; + + /* Shut it up. */ + if (qe_stop(qep)) + return -EAGAIN; + + /* Setup initial rx/tx init block pointers. */ + sbus_writel(qep->qblock_dvma + qib_offset(qe_rxd, 0), cregs + CREG_RXDS); + sbus_writel(qep->qblock_dvma + qib_offset(qe_txd, 0), cregs + CREG_TXDS); + + /* Enable/mask the various irq's. */ + sbus_writel(0, cregs + CREG_RIMASK); + sbus_writel(1, cregs + CREG_TIMASK); + + sbus_writel(0, cregs + CREG_QMASK); + sbus_writel(CREG_MMASK_RXCOLL, cregs + CREG_MMASK); + + /* Setup the FIFO pointers into QEC local memory. */ + tmp = qep->channel * sbus_readl(gregs + GLOB_MSIZE); + sbus_writel(tmp, cregs + CREG_RXRBUFPTR); + sbus_writel(tmp, cregs + CREG_RXWBUFPTR); + + tmp = sbus_readl(cregs + CREG_RXRBUFPTR) + + sbus_readl(gregs + GLOB_RSIZE); + sbus_writel(tmp, cregs + CREG_TXRBUFPTR); + sbus_writel(tmp, cregs + CREG_TXWBUFPTR); + + /* Clear the channel collision counter. */ + sbus_writel(0, cregs + CREG_CCNT); + + /* For 10baseT, inter frame space nor throttle seems to be necessary. */ + sbus_writel(0, cregs + CREG_PIPG); + + /* Now dork with the AMD MACE. */ + sbus_writeb(MREGS_PHYCONFIG_AUTO, mregs + MREGS_PHYCONFIG); + sbus_writeb(MREGS_TXFCNTL_AUTOPAD, mregs + MREGS_TXFCNTL); + sbus_writeb(0, mregs + MREGS_RXFCNTL); + + /* The QEC dma's the rx'd packets from local memory out to main memory, + * and therefore it interrupts when the packet reception is "complete". + * So don't listen for the MACE talking about it. + */ + sbus_writeb(MREGS_IMASK_COLL | MREGS_IMASK_RXIRQ, mregs + MREGS_IMASK); + sbus_writeb(MREGS_BCONFIG_BSWAP | MREGS_BCONFIG_64TS, mregs + MREGS_BCONFIG); + sbus_writeb((MREGS_FCONFIG_TXF16 | MREGS_FCONFIG_RXF32 | + MREGS_FCONFIG_RFWU | MREGS_FCONFIG_TFWU), + mregs + MREGS_FCONFIG); + + /* Only usable interface on QuadEther is twisted pair. */ + sbus_writeb(MREGS_PLSCONFIG_TP, mregs + MREGS_PLSCONFIG); + + /* Tell MACE we are changing the ether address. */ + sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_PARESET, + mregs + MREGS_IACONFIG); + while ((sbus_readb(mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0) + barrier(); + sbus_writeb(e[0], mregs + MREGS_ETHADDR); + sbus_writeb(e[1], mregs + MREGS_ETHADDR); + sbus_writeb(e[2], mregs + MREGS_ETHADDR); + sbus_writeb(e[3], mregs + MREGS_ETHADDR); + sbus_writeb(e[4], mregs + MREGS_ETHADDR); + sbus_writeb(e[5], mregs + MREGS_ETHADDR); + + /* Clear out the address filter. */ + sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET, + mregs + MREGS_IACONFIG); + while ((sbus_readb(mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0) + barrier(); + for (i = 0; i < 8; i++) + sbus_writeb(0, mregs + MREGS_FILTER); + + /* Address changes are now complete. */ + sbus_writeb(0, mregs + MREGS_IACONFIG); + + qe_init_rings(qep); + + /* Wait a little bit for the link to come up... */ + mdelay(5); + if (!(sbus_readb(mregs + MREGS_PHYCONFIG) & MREGS_PHYCONFIG_LTESTDIS)) { + int tries = 50; + + while (--tries) { + u8 tmp; + + mdelay(5); + barrier(); + tmp = sbus_readb(mregs + MREGS_PHYCONFIG); + if ((tmp & MREGS_PHYCONFIG_LSTAT) != 0) + break; + } + if (tries == 0) + printk(KERN_NOTICE "%s: Warning, link state is down.\n", qep->dev->name); + } + + /* Missed packet counter is cleared on a read. */ + sbus_readb(mregs + MREGS_MPCNT); + + /* Reload multicast information, this will enable the receiver + * and transmitter. + */ + qe_set_multicast(qep->dev); + + /* QEC should now start to show interrupts. */ + return 0; +} + +/* Grrr, certain error conditions completely lock up the AMD MACE, + * so when we get these we _must_ reset the chip. + */ +static int qe_is_bolixed(struct sunqe *qep, u32 qe_status) +{ + struct net_device *dev = qep->dev; + int mace_hwbug_workaround = 0; + + if (qe_status & CREG_STAT_EDEFER) { + printk(KERN_ERR "%s: Excessive transmit defers.\n", dev->name); + dev->stats.tx_errors++; + } + + if (qe_status & CREG_STAT_CLOSS) { + printk(KERN_ERR "%s: Carrier lost, link down?\n", dev->name); + dev->stats.tx_errors++; + dev->stats.tx_carrier_errors++; + } + + if (qe_status & CREG_STAT_ERETRIES) { + printk(KERN_ERR "%s: Excessive transmit retries (more than 16).\n", dev->name); + dev->stats.tx_errors++; + mace_hwbug_workaround = 1; + } + + if (qe_status & CREG_STAT_LCOLL) { + printk(KERN_ERR "%s: Late transmit collision.\n", dev->name); + dev->stats.tx_errors++; + dev->stats.collisions++; + mace_hwbug_workaround = 1; + } + + if (qe_status & CREG_STAT_FUFLOW) { + printk(KERN_ERR "%s: Transmit fifo underflow, driver bug.\n", dev->name); + dev->stats.tx_errors++; + mace_hwbug_workaround = 1; + } + + if (qe_status & CREG_STAT_JERROR) { + printk(KERN_ERR "%s: Jabber error.\n", dev->name); + } + + if (qe_status & CREG_STAT_BERROR) { + printk(KERN_ERR "%s: Babble error.\n", dev->name); + } + + if (qe_status & CREG_STAT_CCOFLOW) { + dev->stats.tx_errors += 256; + dev->stats.collisions += 256; + } + + if (qe_status & CREG_STAT_TXDERROR) { + printk(KERN_ERR "%s: Transmit descriptor is bogus, driver bug.\n", dev->name); + dev->stats.tx_errors++; + dev->stats.tx_aborted_errors++; + mace_hwbug_workaround = 1; + } + + if (qe_status & CREG_STAT_TXLERR) { + printk(KERN_ERR "%s: Transmit late error.\n", dev->name); + dev->stats.tx_errors++; + mace_hwbug_workaround = 1; + } + + if (qe_status & CREG_STAT_TXPERR) { + printk(KERN_ERR "%s: Transmit DMA parity error.\n", dev->name); + dev->stats.tx_errors++; + dev->stats.tx_aborted_errors++; + mace_hwbug_workaround = 1; + } + + if (qe_status & CREG_STAT_TXSERR) { + printk(KERN_ERR "%s: Transmit DMA sbus error ack.\n", dev->name); + dev->stats.tx_errors++; + dev->stats.tx_aborted_errors++; + mace_hwbug_workaround = 1; + } + + if (qe_status & CREG_STAT_RCCOFLOW) { + dev->stats.rx_errors += 256; + dev->stats.collisions += 256; + } + + if (qe_status & CREG_STAT_RUOFLOW) { + dev->stats.rx_errors += 256; + dev->stats.rx_over_errors += 256; + } + + if (qe_status & CREG_STAT_MCOFLOW) { + dev->stats.rx_errors += 256; + dev->stats.rx_missed_errors += 256; + } + + if (qe_status & CREG_STAT_RXFOFLOW) { + printk(KERN_ERR "%s: Receive fifo overflow.\n", dev->name); + dev->stats.rx_errors++; + dev->stats.rx_over_errors++; + } + + if (qe_status & CREG_STAT_RLCOLL) { + printk(KERN_ERR "%s: Late receive collision.\n", dev->name); + dev->stats.rx_errors++; + dev->stats.collisions++; + } + + if (qe_status & CREG_STAT_FCOFLOW) { + dev->stats.rx_errors += 256; + dev->stats.rx_frame_errors += 256; + } + + if (qe_status & CREG_STAT_CECOFLOW) { + dev->stats.rx_errors += 256; + dev->stats.rx_crc_errors += 256; + } + + if (qe_status & CREG_STAT_RXDROP) { + printk(KERN_ERR "%s: Receive packet dropped.\n", dev->name); + dev->stats.rx_errors++; + dev->stats.rx_dropped++; + dev->stats.rx_missed_errors++; + } + + if (qe_status & CREG_STAT_RXSMALL) { + printk(KERN_ERR "%s: Receive buffer too small, driver bug.\n", dev->name); + dev->stats.rx_errors++; + dev->stats.rx_length_errors++; + } + + if (qe_status & CREG_STAT_RXLERR) { + printk(KERN_ERR "%s: Receive late error.\n", dev->name); + dev->stats.rx_errors++; + mace_hwbug_workaround = 1; + } + + if (qe_status & CREG_STAT_RXPERR) { + printk(KERN_ERR "%s: Receive DMA parity error.\n", dev->name); + dev->stats.rx_errors++; + dev->stats.rx_missed_errors++; + mace_hwbug_workaround = 1; + } + + if (qe_status & CREG_STAT_RXSERR) { + printk(KERN_ERR "%s: Receive DMA sbus error ack.\n", dev->name); + dev->stats.rx_errors++; + dev->stats.rx_missed_errors++; + mace_hwbug_workaround = 1; + } + + if (mace_hwbug_workaround) + qe_init(qep, 1); + return mace_hwbug_workaround; +} + +/* Per-QE receive interrupt service routine. Just like on the happy meal + * we receive directly into skb's with a small packet copy water mark. + */ +static void qe_rx(struct sunqe *qep) +{ + struct qe_rxd *rxbase = &qep->qe_block->qe_rxd[0]; + struct net_device *dev = qep->dev; + struct qe_rxd *this; + struct sunqe_buffers *qbufs = qep->buffers; + __u32 qbufs_dvma = qep->buffers_dvma; + int elem = qep->rx_new, drops = 0; + u32 flags; + + this = &rxbase[elem]; + while (!((flags = this->rx_flags) & RXD_OWN)) { + struct sk_buff *skb; + unsigned char *this_qbuf = + &qbufs->rx_buf[elem & (RX_RING_SIZE - 1)][0]; + __u32 this_qbuf_dvma = qbufs_dvma + + qebuf_offset(rx_buf, (elem & (RX_RING_SIZE - 1))); + struct qe_rxd *end_rxd = + &rxbase[(elem+RX_RING_SIZE)&(RX_RING_MAXSIZE-1)]; + int len = (flags & RXD_LENGTH) - 4; /* QE adds ether FCS size to len */ + + /* Check for errors. */ + if (len < ETH_ZLEN) { + dev->stats.rx_errors++; + dev->stats.rx_length_errors++; + dev->stats.rx_dropped++; + } else { + skb = dev_alloc_skb(len + 2); + if (skb == NULL) { + drops++; + dev->stats.rx_dropped++; + } else { + skb_reserve(skb, 2); + skb_put(skb, len); + skb_copy_to_linear_data(skb, (unsigned char *) this_qbuf, + len); + skb->protocol = eth_type_trans(skb, qep->dev); + netif_rx(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes += len; + } + } + end_rxd->rx_addr = this_qbuf_dvma; + end_rxd->rx_flags = (RXD_OWN | ((RXD_PKT_SZ) & RXD_LENGTH)); + + elem = NEXT_RX(elem); + this = &rxbase[elem]; + } + qep->rx_new = elem; + if (drops) + printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", qep->dev->name); +} + +static void qe_tx_reclaim(struct sunqe *qep); + +/* Interrupts for all QE's get filtered out via the QEC master controller, + * so we just run through each qe and check to see who is signaling + * and thus needs to be serviced. + */ +static irqreturn_t qec_interrupt(int irq, void *dev_id) +{ + struct sunqec *qecp = dev_id; + u32 qec_status; + int channel = 0; + + /* Latch the status now. */ + qec_status = sbus_readl(qecp->gregs + GLOB_STAT); + while (channel < 4) { + if (qec_status & 0xf) { + struct sunqe *qep = qecp->qes[channel]; + u32 qe_status; + + qe_status = sbus_readl(qep->qcregs + CREG_STAT); + if (qe_status & CREG_STAT_ERRORS) { + if (qe_is_bolixed(qep, qe_status)) + goto next; + } + if (qe_status & CREG_STAT_RXIRQ) + qe_rx(qep); + if (netif_queue_stopped(qep->dev) && + (qe_status & CREG_STAT_TXIRQ)) { + spin_lock(&qep->lock); + qe_tx_reclaim(qep); + if (TX_BUFFS_AVAIL(qep) > 0) { + /* Wake net queue and return to + * lazy tx reclaim. + */ + netif_wake_queue(qep->dev); + sbus_writel(1, qep->qcregs + CREG_TIMASK); + } + spin_unlock(&qep->lock); + } + next: + ; + } + qec_status >>= 4; + channel++; + } + + return IRQ_HANDLED; +} + +static int qe_open(struct net_device *dev) +{ + struct sunqe *qep = netdev_priv(dev); + + qep->mconfig = (MREGS_MCONFIG_TXENAB | + MREGS_MCONFIG_RXENAB | + MREGS_MCONFIG_MBAENAB); + return qe_init(qep, 0); +} + +static int qe_close(struct net_device *dev) +{ + struct sunqe *qep = netdev_priv(dev); + + qe_stop(qep); + return 0; +} + +/* Reclaim TX'd frames from the ring. This must always run under + * the IRQ protected qep->lock. + */ +static void qe_tx_reclaim(struct sunqe *qep) +{ + struct qe_txd *txbase = &qep->qe_block->qe_txd[0]; + int elem = qep->tx_old; + + while (elem != qep->tx_new) { + u32 flags = txbase[elem].tx_flags; + + if (flags & TXD_OWN) + break; + elem = NEXT_TX(elem); + } + qep->tx_old = elem; +} + +static void qe_tx_timeout(struct net_device *dev) +{ + struct sunqe *qep = netdev_priv(dev); + int tx_full; + + spin_lock_irq(&qep->lock); + + /* Try to reclaim, if that frees up some tx + * entries, we're fine. + */ + qe_tx_reclaim(qep); + tx_full = TX_BUFFS_AVAIL(qep) <= 0; + + spin_unlock_irq(&qep->lock); + + if (! tx_full) + goto out; + + printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name); + qe_init(qep, 1); + +out: + netif_wake_queue(dev); +} + +/* Get a packet queued to go onto the wire. */ +static int qe_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct sunqe *qep = netdev_priv(dev); + struct sunqe_buffers *qbufs = qep->buffers; + __u32 txbuf_dvma, qbufs_dvma = qep->buffers_dvma; + unsigned char *txbuf; + int len, entry; + + spin_lock_irq(&qep->lock); + + qe_tx_reclaim(qep); + + len = skb->len; + entry = qep->tx_new; + + txbuf = &qbufs->tx_buf[entry & (TX_RING_SIZE - 1)][0]; + txbuf_dvma = qbufs_dvma + + qebuf_offset(tx_buf, (entry & (TX_RING_SIZE - 1))); + + /* Avoid a race... */ + qep->qe_block->qe_txd[entry].tx_flags = TXD_UPDATE; + + skb_copy_from_linear_data(skb, txbuf, len); + + qep->qe_block->qe_txd[entry].tx_addr = txbuf_dvma; + qep->qe_block->qe_txd[entry].tx_flags = + (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH)); + qep->tx_new = NEXT_TX(entry); + + /* Get it going. */ + sbus_writel(CREG_CTRL_TWAKEUP, qep->qcregs + CREG_CTRL); + + dev->stats.tx_packets++; + dev->stats.tx_bytes += len; + + if (TX_BUFFS_AVAIL(qep) <= 0) { + /* Halt the net queue and enable tx interrupts. + * When the tx queue empties the tx irq handler + * will wake up the queue and return us back to + * the lazy tx reclaim scheme. + */ + netif_stop_queue(dev); + sbus_writel(0, qep->qcregs + CREG_TIMASK); + } + spin_unlock_irq(&qep->lock); + + dev_kfree_skb(skb); + + return NETDEV_TX_OK; +} + +static void qe_set_multicast(struct net_device *dev) +{ + struct sunqe *qep = netdev_priv(dev); + struct netdev_hw_addr *ha; + u8 new_mconfig = qep->mconfig; + int i; + u32 crc; + + /* Lock out others. */ + netif_stop_queue(dev); + + if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) { + sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET, + qep->mregs + MREGS_IACONFIG); + while ((sbus_readb(qep->mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0) + barrier(); + for (i = 0; i < 8; i++) + sbus_writeb(0xff, qep->mregs + MREGS_FILTER); + sbus_writeb(0, qep->mregs + MREGS_IACONFIG); + } else if (dev->flags & IFF_PROMISC) { + new_mconfig |= MREGS_MCONFIG_PROMISC; + } else { + u16 hash_table[4]; + u8 *hbytes = (unsigned char *) &hash_table[0]; + + memset(hash_table, 0, sizeof(hash_table)); + netdev_for_each_mc_addr(ha, dev) { + crc = ether_crc_le(6, ha->addr); + crc >>= 26; + hash_table[crc >> 4] |= 1 << (crc & 0xf); + } + /* Program the qe with the new filter value. */ + sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET, + qep->mregs + MREGS_IACONFIG); + while ((sbus_readb(qep->mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0) + barrier(); + for (i = 0; i < 8; i++) { + u8 tmp = *hbytes++; + sbus_writeb(tmp, qep->mregs + MREGS_FILTER); + } + sbus_writeb(0, qep->mregs + MREGS_IACONFIG); + } + + /* Any change of the logical address filter, the physical address, + * or enabling/disabling promiscuous mode causes the MACE to disable + * the receiver. So we must re-enable them here or else the MACE + * refuses to listen to anything on the network. Sheesh, took + * me a day or two to find this bug. + */ + qep->mconfig = new_mconfig; + sbus_writeb(qep->mconfig, qep->mregs + MREGS_MCONFIG); + + /* Let us get going again. */ + netif_wake_queue(dev); +} + +/* Ethtool support... */ +static void qe_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) +{ + const struct linux_prom_registers *regs; + struct sunqe *qep = netdev_priv(dev); + struct platform_device *op; + + strcpy(info->driver, "sunqe"); + strcpy(info->version, "3.0"); + + op = qep->op; + regs = of_get_property(op->dev.of_node, "reg", NULL); + if (regs) + sprintf(info->bus_info, "SBUS:%d", regs->which_io); + +} + +static u32 qe_get_link(struct net_device *dev) +{ + struct sunqe *qep = netdev_priv(dev); + void __iomem *mregs = qep->mregs; + u8 phyconfig; + + spin_lock_irq(&qep->lock); + phyconfig = sbus_readb(mregs + MREGS_PHYCONFIG); + spin_unlock_irq(&qep->lock); + + return phyconfig & MREGS_PHYCONFIG_LSTAT; +} + +static const struct ethtool_ops qe_ethtool_ops = { + .get_drvinfo = qe_get_drvinfo, + .get_link = qe_get_link, +}; + +/* This is only called once at boot time for each card probed. */ +static void qec_init_once(struct sunqec *qecp, struct platform_device *op) +{ + u8 bsizes = qecp->qec_bursts; + + if (sbus_can_burst64() && (bsizes & DMA_BURST64)) { + sbus_writel(GLOB_CTRL_B64, qecp->gregs + GLOB_CTRL); + } else if (bsizes & DMA_BURST32) { + sbus_writel(GLOB_CTRL_B32, qecp->gregs + GLOB_CTRL); + } else { + sbus_writel(GLOB_CTRL_B16, qecp->gregs + GLOB_CTRL); + } + + /* Packetsize only used in 100baseT BigMAC configurations, + * set it to zero just to be on the safe side. + */ + sbus_writel(GLOB_PSIZE_2048, qecp->gregs + GLOB_PSIZE); + + /* Set the local memsize register, divided up to one piece per QE channel. */ + sbus_writel((resource_size(&op->resource[1]) >> 2), + qecp->gregs + GLOB_MSIZE); + + /* Divide up the local QEC memory amongst the 4 QE receiver and + * transmitter FIFOs. Basically it is (total / 2 / num_channels). + */ + sbus_writel((resource_size(&op->resource[1]) >> 2) >> 1, + qecp->gregs + GLOB_TSIZE); + sbus_writel((resource_size(&op->resource[1]) >> 2) >> 1, + qecp->gregs + GLOB_RSIZE); +} + +static u8 __devinit qec_get_burst(struct device_node *dp) +{ + u8 bsizes, bsizes_more; + + /* Find and set the burst sizes for the QEC, since it + * does the actual dma for all 4 channels. + */ + bsizes = of_getintprop_default(dp, "burst-sizes", 0xff); + bsizes &= 0xff; + bsizes_more = of_getintprop_default(dp->parent, "burst-sizes", 0xff); + + if (bsizes_more != 0xff) + bsizes &= bsizes_more; + if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 || + (bsizes & DMA_BURST32)==0) + bsizes = (DMA_BURST32 - 1); + + return bsizes; +} + +static struct sunqec * __devinit get_qec(struct platform_device *child) +{ + struct platform_device *op = to_platform_device(child->dev.parent); + struct sunqec *qecp; + + qecp = dev_get_drvdata(&op->dev); + if (!qecp) { + qecp = kzalloc(sizeof(struct sunqec), GFP_KERNEL); + if (qecp) { + u32 ctrl; + + qecp->op = op; + qecp->gregs = of_ioremap(&op->resource[0], 0, + GLOB_REG_SIZE, + "QEC Global Registers"); + if (!qecp->gregs) + goto fail; + + /* Make sure the QEC is in MACE mode. */ + ctrl = sbus_readl(qecp->gregs + GLOB_CTRL); + ctrl &= 0xf0000000; + if (ctrl != GLOB_CTRL_MMODE) { + printk(KERN_ERR "qec: Not in MACE mode!\n"); + goto fail; + } + + if (qec_global_reset(qecp->gregs)) + goto fail; + + qecp->qec_bursts = qec_get_burst(op->dev.of_node); + + qec_init_once(qecp, op); + + if (request_irq(op->archdata.irqs[0], qec_interrupt, + IRQF_SHARED, "qec", (void *) qecp)) { + printk(KERN_ERR "qec: Can't register irq.\n"); + goto fail; + } + + dev_set_drvdata(&op->dev, qecp); + + qecp->next_module = root_qec_dev; + root_qec_dev = qecp; + } + } + + return qecp; + +fail: + if (qecp->gregs) + of_iounmap(&op->resource[0], qecp->gregs, GLOB_REG_SIZE); + kfree(qecp); + return NULL; +} + +static const struct net_device_ops qec_ops = { + .ndo_open = qe_open, + .ndo_stop = qe_close, + .ndo_start_xmit = qe_start_xmit, + .ndo_set_rx_mode = qe_set_multicast, + .ndo_tx_timeout = qe_tx_timeout, + .ndo_change_mtu = eth_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static int __devinit qec_ether_init(struct platform_device *op) +{ + static unsigned version_printed; + struct net_device *dev; + struct sunqec *qecp; + struct sunqe *qe; + int i, res; + + if (version_printed++ == 0) + printk(KERN_INFO "%s", version); + + dev = alloc_etherdev(sizeof(struct sunqe)); + if (!dev) + return -ENOMEM; + + memcpy(dev->dev_addr, idprom->id_ethaddr, 6); + + qe = netdev_priv(dev); + + res = -ENODEV; + + i = of_getintprop_default(op->dev.of_node, "channel#", -1); + if (i == -1) + goto fail; + qe->channel = i; + spin_lock_init(&qe->lock); + + qecp = get_qec(op); + if (!qecp) + goto fail; + + qecp->qes[qe->channel] = qe; + qe->dev = dev; + qe->parent = qecp; + qe->op = op; + + res = -ENOMEM; + qe->qcregs = of_ioremap(&op->resource[0], 0, + CREG_REG_SIZE, "QEC Channel Registers"); + if (!qe->qcregs) { + printk(KERN_ERR "qe: Cannot map channel registers.\n"); + goto fail; + } + + qe->mregs = of_ioremap(&op->resource[1], 0, + MREGS_REG_SIZE, "QE MACE Registers"); + if (!qe->mregs) { + printk(KERN_ERR "qe: Cannot map MACE registers.\n"); + goto fail; + } + + qe->qe_block = dma_alloc_coherent(&op->dev, PAGE_SIZE, + &qe->qblock_dvma, GFP_ATOMIC); + qe->buffers = dma_alloc_coherent(&op->dev, sizeof(struct sunqe_buffers), + &qe->buffers_dvma, GFP_ATOMIC); + if (qe->qe_block == NULL || qe->qblock_dvma == 0 || + qe->buffers == NULL || qe->buffers_dvma == 0) + goto fail; + + /* Stop this QE. */ + qe_stop(qe); + + SET_NETDEV_DEV(dev, &op->dev); + + dev->watchdog_timeo = 5*HZ; + dev->irq = op->archdata.irqs[0]; + dev->dma = 0; + dev->ethtool_ops = &qe_ethtool_ops; + dev->netdev_ops = &qec_ops; + + res = register_netdev(dev); + if (res) + goto fail; + + dev_set_drvdata(&op->dev, qe); + + printk(KERN_INFO "%s: qe channel[%d] ", dev->name, qe->channel); + for (i = 0; i < 6; i++) + printk ("%2.2x%c", + dev->dev_addr[i], + i == 5 ? ' ': ':'); + printk("\n"); + + + return 0; + +fail: + if (qe->qcregs) + of_iounmap(&op->resource[0], qe->qcregs, CREG_REG_SIZE); + if (qe->mregs) + of_iounmap(&op->resource[1], qe->mregs, MREGS_REG_SIZE); + if (qe->qe_block) + dma_free_coherent(&op->dev, PAGE_SIZE, + qe->qe_block, qe->qblock_dvma); + if (qe->buffers) + dma_free_coherent(&op->dev, + sizeof(struct sunqe_buffers), + qe->buffers, + qe->buffers_dvma); + + free_netdev(dev); + + return res; +} + +static int __devinit qec_sbus_probe(struct platform_device *op) +{ + return qec_ether_init(op); +} + +static int __devexit qec_sbus_remove(struct platform_device *op) +{ + struct sunqe *qp = dev_get_drvdata(&op->dev); + struct net_device *net_dev = qp->dev; + + unregister_netdev(net_dev); + + of_iounmap(&op->resource[0], qp->qcregs, CREG_REG_SIZE); + of_iounmap(&op->resource[1], qp->mregs, MREGS_REG_SIZE); + dma_free_coherent(&op->dev, PAGE_SIZE, + qp->qe_block, qp->qblock_dvma); + dma_free_coherent(&op->dev, sizeof(struct sunqe_buffers), + qp->buffers, qp->buffers_dvma); + + free_netdev(net_dev); + + dev_set_drvdata(&op->dev, NULL); + + return 0; +} + +static const struct of_device_id qec_sbus_match[] = { + { + .name = "qe", + }, + {}, +}; + +MODULE_DEVICE_TABLE(of, qec_sbus_match); + +static struct platform_driver qec_sbus_driver = { + .driver = { + .name = "qec", + .owner = THIS_MODULE, + .of_match_table = qec_sbus_match, + }, + .probe = qec_sbus_probe, + .remove = __devexit_p(qec_sbus_remove), +}; + +static int __init qec_init(void) +{ + return platform_driver_register(&qec_sbus_driver); +} + +static void __exit qec_exit(void) +{ + platform_driver_unregister(&qec_sbus_driver); + + while (root_qec_dev) { + struct sunqec *next = root_qec_dev->next_module; + struct platform_device *op = root_qec_dev->op; + + free_irq(op->archdata.irqs[0], (void *) root_qec_dev); + of_iounmap(&op->resource[0], root_qec_dev->gregs, + GLOB_REG_SIZE); + kfree(root_qec_dev); + + root_qec_dev = next; + } +} + +module_init(qec_init); +module_exit(qec_exit); |