diff options
Diffstat (limited to 'drivers/net/sunqe.c')
| -rw-r--r-- | drivers/net/sunqe.c | 1007 |
1 files changed, 0 insertions, 1007 deletions
diff --git a/drivers/net/sunqe.c b/drivers/net/sunqe.c deleted file mode 100644 index 209c7f8df003..000000000000 --- a/drivers/net/sunqe.c +++ /dev/null @@ -1,1007 +0,0 @@ -/* 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_multicast_list = 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); |