Merge branch 'for-david' of git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6

9 files changed, 1585 insertions, 184 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 4b54fda5ac72..7f73db02c53e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1844,7 +1844,7 @@ P:	Haavard Skinnemoen
 M:	hskinnemoen@atmel.com
 S:	Supported
 
-GENERIC HDLC DRIVER, N2, C101, PCI200SYN and WANXL DRIVERS
+GENERIC HDLC (WAN) DRIVERS
 P:	Krzysztof Halasa
 M:	khc@pm.waw.pl
 W:	http://www.kernel.org/pub/linux/utils/net/hdlc/
@@ -2243,6 +2243,11 @@ M:	dan.j.williams@intel.com
 L:	linux-kernel@vger.kernel.org
 S:	Supported
 
+INTEL IXP4XX QMGR, NPE, ETHERNET and HSS SUPPORT
+P:	Krzysztof Halasa
+M:	khc@pm.waw.pl
+S:	Maintained
+
 INTEL IXP4XX RANDOM NUMBER GENERATOR SUPPORT
 P:	Deepak Saxena
 M:	dsaxena@plexity.net
diff --git a/arch/arm/mach-ixp4xx/include/mach/qmgr.h b/arch/arm/mach-ixp4xx/include/mach/qmgr.h
index 1e52b95cede5..0cbe6ceb67c5 100644
--- a/arch/arm/mach-ixp4xx/include/mach/qmgr.h
+++ b/arch/arm/mach-ixp4xx/include/mach/qmgr.h
@@ -12,6 +12,8 @@
 #include <linux/io.h>
 #include <linux/kernel.h>
 
+#define DEBUG_QMGR	0
+
 #define HALF_QUEUES	32
 #define QUEUES		64	/* only 32 lower queues currently supported */
 #define MAX_QUEUE_LENGTH 4	/* in dwords */
@@ -61,22 +63,51 @@ void qmgr_enable_irq(unsigned int queue);
 void qmgr_disable_irq(unsigned int queue);
 
 /* request_ and release_queue() must be called from non-IRQ context */
+
+#if DEBUG_QMGR
+extern char qmgr_queue_descs[QUEUES][32];
+
 int qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
 		       unsigned int nearly_empty_watermark,
-		       unsigned int nearly_full_watermark);
+		       unsigned int nearly_full_watermark,
+		       const char *desc_format, const char* name);
+#else
+int __qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
+			 unsigned int nearly_empty_watermark,
+			 unsigned int nearly_full_watermark);
+#define qmgr_request_queue(queue, len, nearly_empty_watermark,		\
+			   nearly_full_watermark, desc_format, name)	\
+	__qmgr_request_queue(queue, len, nearly_empty_watermark,	\
+			     nearly_full_watermark)
+#endif
+
 void qmgr_release_queue(unsigned int queue);
 
 
 static inline void qmgr_put_entry(unsigned int queue, u32 val)
 {
 	extern struct qmgr_regs __iomem *qmgr_regs;
+#if DEBUG_QMGR
+	BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
+
+	printk(KERN_DEBUG "Queue %s(%i) put %X\n",
+	       qmgr_queue_descs[queue], queue, val);
+#endif
 	__raw_writel(val, &qmgr_regs->acc[queue][0]);
 }
 
 static inline u32 qmgr_get_entry(unsigned int queue)
 {
+	u32 val;
 	extern struct qmgr_regs __iomem *qmgr_regs;
-	return __raw_readl(&qmgr_regs->acc[queue][0]);
+	val = __raw_readl(&qmgr_regs->acc[queue][0]);
+#if DEBUG_QMGR
+	BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
+
+	printk(KERN_DEBUG "Queue %s(%i) get %X\n",
+	       qmgr_queue_descs[queue], queue, val);
+#endif
+	return val;
 }
 
 static inline int qmgr_get_stat1(unsigned int queue)
diff --git a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
index c6cb069a5a83..bfddc73d0a20 100644
--- a/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
+++ b/arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
@@ -14,8 +14,6 @@
 #include <linux/module.h>
 #include <mach/qmgr.h>
 
-#define DEBUG		0
-
 struct qmgr_regs __iomem *qmgr_regs;
 static struct resource *mem_res;
 static spinlock_t qmgr_lock;
@@ -23,6 +21,10 @@ static u32 used_sram_bitmap[4]; /* 128 16-dword pages */
 static void (*irq_handlers[HALF_QUEUES])(void *pdev);
 static void *irq_pdevs[HALF_QUEUES];
 
+#if DEBUG_QMGR
+char qmgr_queue_descs[QUEUES][32];
+#endif
+
 void qmgr_set_irq(unsigned int queue, int src,
 		  void (*handler)(void *pdev), void *pdev)
 {
@@ -70,6 +72,7 @@ void qmgr_disable_irq(unsigned int queue)
 	spin_lock_irqsave(&qmgr_lock, flags);
 	__raw_writel(__raw_readl(&qmgr_regs->irqen[0]) & ~(1 << queue),
 		     &qmgr_regs->irqen[0]);
+	__raw_writel(1 << queue, &qmgr_regs->irqstat[0]); /* clear */
 	spin_unlock_irqrestore(&qmgr_lock, flags);
 }
 
@@ -81,9 +84,16 @@ static inline void shift_mask(u32 *mask)
 	mask[0] <<= 1;
 }
 
+#if DEBUG_QMGR
 int qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
 		       unsigned int nearly_empty_watermark,
-		       unsigned int nearly_full_watermark)
+		       unsigned int nearly_full_watermark,
+		       const char *desc_format, const char* name)
+#else
+int __qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
+			 unsigned int nearly_empty_watermark,
+			 unsigned int nearly_full_watermark)
+#endif
 {
 	u32 cfg, addr = 0, mask[4]; /* in 16-dwords */
 	int err;
@@ -151,12 +161,13 @@ int qmgr_request_queue(unsigned int queue, unsigned int len /* dwords */,
 	used_sram_bitmap[2] |= mask[2];
 	used_sram_bitmap[3] |= mask[3];
 	__raw_writel(cfg | (addr << 14), &qmgr_regs->sram[queue]);
-	spin_unlock_irq(&qmgr_lock);
-
-#if DEBUG
-	printk(KERN_DEBUG "qmgr: requested queue %i, addr = 0x%02X\n",
-	       queue, addr);
+#if DEBUG_QMGR
+	snprintf(qmgr_queue_descs[queue], sizeof(qmgr_queue_descs[0]),
+		 desc_format, name);
+	printk(KERN_DEBUG "qmgr: requested queue %s(%i) addr = 0x%02X\n",
+	       qmgr_queue_descs[queue], queue, addr);
 #endif
+	spin_unlock_irq(&qmgr_lock);
 	return 0;
 
 err:
@@ -189,6 +200,11 @@ void qmgr_release_queue(unsigned int queue)
 	while (addr--)
 		shift_mask(mask);
 
+#if DEBUG_QMGR
+	printk(KERN_DEBUG "qmgr: releasing queue %s(%i)\n",
+	       qmgr_queue_descs[queue], queue);
+	qmgr_queue_descs[queue][0] = '\x0';
+#endif
 	__raw_writel(0, &qmgr_regs->sram[queue]);
 
 	used_sram_bitmap[0] &= ~mask[0];
@@ -199,9 +215,10 @@ void qmgr_release_queue(unsigned int queue)
 	spin_unlock_irq(&qmgr_lock);
 
 	module_put(THIS_MODULE);
-#if DEBUG
-	printk(KERN_DEBUG "qmgr: released queue %i\n", queue);
-#endif
+
+	while ((addr = qmgr_get_entry(queue)))
+		printk(KERN_ERR "qmgr: released queue %i not empty: 0x%08X\n",
+		       queue, addr);
 }
 
 static int qmgr_init(void)
@@ -272,5 +289,10 @@ EXPORT_SYMBOL(qmgr_regs);
 EXPORT_SYMBOL(qmgr_set_irq);
 EXPORT_SYMBOL(qmgr_enable_irq);
 EXPORT_SYMBOL(qmgr_disable_irq);
+#if DEBUG_QMGR
+EXPORT_SYMBOL(qmgr_queue_descs);
 EXPORT_SYMBOL(qmgr_request_queue);
+#else
+EXPORT_SYMBOL(__qmgr_request_queue);
+#endif
 EXPORT_SYMBOL(qmgr_release_queue);
diff --git a/drivers/net/arm/Kconfig b/drivers/net/arm/Kconfig
index abe17762e6f5..2895db13bfa4 100644
--- a/drivers/net/arm/Kconfig
+++ b/drivers/net/arm/Kconfig
@@ -59,7 +59,7 @@ config EP93XX_ETH
 config IXP4XX_ETH
 	tristate "Intel IXP4xx Ethernet support"
 	depends on ARM && ARCH_IXP4XX && IXP4XX_NPE && IXP4XX_QMGR
-	select MII
+	select PHYLIB
 	help
 	  Say Y here if you want to use built-in Ethernet ports
 	  on IXP4xx processor.
diff --git a/drivers/net/arm/ixp4xx_eth.c b/drivers/net/arm/ixp4xx_eth.c
index b03609f2e90f..26af411fc428 100644
--- a/drivers/net/arm/ixp4xx_eth.c
+++ b/drivers/net/arm/ixp4xx_eth.c
@@ -30,12 +30,11 @@
 #include <linux/etherdevice.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
-#include <linux/mii.h>
+#include <linux/phy.h>
 #include <linux/platform_device.h>
 #include <mach/npe.h>
 #include <mach/qmgr.h>
 
-#define DEBUG_QUEUES		0
 #define DEBUG_DESC		0
 #define DEBUG_RX		0
 #define DEBUG_TX		0
@@ -59,7 +58,6 @@
 #define NAPI_WEIGHT		16
 #define MDIO_INTERVAL		(3 * HZ)
 #define MAX_MDIO_RETRIES	100 /* microseconds, typically 30 cycles */
-#define MAX_MII_RESET_RETRIES	100 /* mdio_read() cycles, typically 4 */
 #define MAX_CLOSE_WAIT		1000 /* microseconds, typically 2-3 cycles */
 
 #define NPE_ID(port_id)		((port_id) >> 4)
@@ -164,15 +162,14 @@ struct port {
 	struct npe *npe;
 	struct net_device *netdev;
 	struct napi_struct napi;
-	struct net_device_stats stat;
-	struct mii_if_info mii;
-	struct delayed_work mdio_thread;
+	struct phy_device *phydev;
 	struct eth_plat_info *plat;
 	buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
 	struct desc *desc_tab;	/* coherent */
 	u32 desc_tab_phys;
 	int id;			/* logical port ID */
-	u16 mii_bmcr;
+	int speed, duplex;
+	u8 firmware[4];
 };
 
 /* NPE message structure */
@@ -243,19 +240,20 @@ static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
 
 static spinlock_t mdio_lock;
 static struct eth_regs __iomem *mdio_regs; /* mdio command and status only */
+struct mii_bus *mdio_bus;
 static int ports_open;
 static struct port *npe_port_tab[MAX_NPES];
 static struct dma_pool *dma_pool;
 
 
-static u16 mdio_cmd(struct net_device *dev, int phy_id, int location,
-		    int write, u16 cmd)
+static int ixp4xx_mdio_cmd(struct mii_bus *bus, int phy_id, int location,
+			   int write, u16 cmd)
 {
 	int cycles = 0;
 
 	if (__raw_readl(&mdio_regs->mdio_command[3]) & 0x80) {
-		printk(KERN_ERR "%s: MII not ready to transmit\n", dev->name);
-		return 0;
+		printk(KERN_ERR "%s: MII not ready to transmit\n", bus->name);
+		return -1;
 	}
 
 	if (write) {
@@ -274,107 +272,119 @@ static u16 mdio_cmd(struct net_device *dev, int phy_id, int location,
 	}
 
 	if (cycles == MAX_MDIO_RETRIES) {
-		printk(KERN_ERR "%s: MII write failed\n", dev->name);
-		return 0;
+		printk(KERN_ERR "%s #%i: MII write failed\n", bus->name,
+		       phy_id);
+		return -1;
 	}
 
 #if DEBUG_MDIO
-	printk(KERN_DEBUG "%s: mdio_cmd() took %i cycles\n", dev->name,
-	       cycles);
+	printk(KERN_DEBUG "%s #%i: mdio_%s() took %i cycles\n", bus->name,
+	       phy_id, write ? "write" : "read", cycles);
 #endif
 
 	if (write)
 		return 0;
 
 	if (__raw_readl(&mdio_regs->mdio_status[3]) & 0x80) {
-		printk(KERN_ERR "%s: MII read failed\n", dev->name);
-		return 0;
+#if DEBUG_MDIO
+		printk(KERN_DEBUG "%s #%i: MII read failed\n", bus->name,
+		       phy_id);
+#endif
+		return 0xFFFF; /* don't return error */
 	}
 
 	return (__raw_readl(&mdio_regs->mdio_status[0]) & 0xFF) |
-		(__raw_readl(&mdio_regs->mdio_status[1]) << 8);
+		((__raw_readl(&mdio_regs->mdio_status[1]) & 0xFF) << 8);
 }
 
-static int mdio_read(struct net_device *dev, int phy_id, int location)
+static int ixp4xx_mdio_read(struct mii_bus *bus, int phy_id, int location)
 {
 	unsigned long flags;
-	u16 val;
+	int ret;
 
 	spin_lock_irqsave(&mdio_lock, flags);
-	val = mdio_cmd(dev, phy_id, location, 0, 0);
+	ret = ixp4xx_mdio_cmd(bus, phy_id, location, 0, 0);
 	spin_unlock_irqrestore(&mdio_lock, flags);
-	return val;
+#if DEBUG_MDIO
+	printk(KERN_DEBUG "%s #%i: MII read [%i] -> 0x%X\n", bus->name,
+	       phy_id, location, ret);
+#endif
+	return ret;
 }
 
-static void mdio_write(struct net_device *dev, int phy_id, int location,
-		       int val)
+static int ixp4xx_mdio_write(struct mii_bus *bus, int phy_id, int location,
+			     u16 val)
 {
 	unsigned long flags;
+	int ret;
 
 	spin_lock_irqsave(&mdio_lock, flags);
-	mdio_cmd(dev, phy_id, location, 1, val);
+	ret = ixp4xx_mdio_cmd(bus, phy_id, location, 1, val);
 	spin_unlock_irqrestore(&mdio_lock, flags);
+#if DEBUG_MDIO
+	printk(KERN_DEBUG "%s #%i: MII read [%i] <- 0x%X, err = %i\n",
+	       bus->name, phy_id, location, val, ret);
+#endif
+	return ret;
 }
 
-static void phy_reset(struct net_device *dev, int phy_id)
+static int ixp4xx_mdio_register(void)
 {
-	struct port *port = netdev_priv(dev);
-	int cycles = 0;
+	int err;
 
-	mdio_write(dev, phy_id, MII_BMCR, port->mii_bmcr | BMCR_RESET);
+	if (!(mdio_bus = mdiobus_alloc()))
+		return -ENOMEM;
 
-	while (cycles < MAX_MII_RESET_RETRIES) {
-		if (!(mdio_read(dev, phy_id, MII_BMCR) & BMCR_RESET)) {
-#if DEBUG_MDIO
-			printk(KERN_DEBUG "%s: phy_reset() took %i cycles\n",
-			       dev->name, cycles);
-#endif
-			return;
-		}
-		udelay(1);
-		cycles++;
-	}
+	/* All MII PHY accesses use NPE-B Ethernet registers */
+	spin_lock_init(&mdio_lock);
+	mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
+	__raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
+
+	mdio_bus->name = "IXP4xx MII Bus";
+	mdio_bus->read = &ixp4xx_mdio_read;
+	mdio_bus->write = &ixp4xx_mdio_write;
+	strcpy(mdio_bus->id, "0");
 
-	printk(KERN_ERR "%s: MII reset failed\n", dev->name);
+	if ((err = mdiobus_register(mdio_bus)))
+		mdiobus_free(mdio_bus);
+	return err;
 }
 
-static void eth_set_duplex(struct port *port)
+static void ixp4xx_mdio_remove(void)
 {
-	if (port->mii.full_duplex)
-		__raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
-			     &port->regs->tx_control[0]);
-	else
-		__raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
-			     &port->regs->tx_control[0]);
+	mdiobus_unregister(mdio_bus);
+	mdiobus_free(mdio_bus);
 }
 
 
-static void phy_check_media(struct port *port, int init)
+static void ixp4xx_adjust_link(struct net_device *dev)
 {
-	if (mii_check_media(&port->mii, 1, init))
-		eth_set_duplex(port);
-	if (port->mii.force_media) { /* mii_check_media() doesn't work */
-		struct net_device *dev = port->netdev;
-		int cur_link = mii_link_ok(&port->mii);
-		int prev_link = netif_carrier_ok(dev);
-
-		if (!prev_link && cur_link) {
-			printk(KERN_INFO "%s: link up\n", dev->name);
-			netif_carrier_on(dev);
-		} else if (prev_link && !cur_link) {
+	struct port *port = netdev_priv(dev);
+	struct phy_device *phydev = port->phydev;
+
+	if (!phydev->link) {
+		if (port->speed) {
+			port->speed = 0;
 			printk(KERN_INFO "%s: link down\n", dev->name);
-			netif_carrier_off(dev);
 		}
+		return;
 	}
-}
 
+	if (port->speed == phydev->speed && port->duplex == phydev->duplex)
+		return;
 
-static void mdio_thread(struct work_struct *work)
-{
-	struct port *port = container_of(work, struct port, mdio_thread.work);
+	port->speed = phydev->speed;
+	port->duplex = phydev->duplex;
+
+	if (port->duplex)
+		__raw_writel(DEFAULT_TX_CNTRL0 & ~TX_CNTRL0_HALFDUPLEX,
+			     &port->regs->tx_control[0]);
+	else
+		__raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
+			     &port->regs->tx_control[0]);
 
-	phy_check_media(port, 0);
-	schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL);
+	printk(KERN_INFO "%s: link up, speed %u Mb/s, %s duplex\n",
+	       dev->name, port->speed, port->duplex ? "full" : "half");
 }
 
 
@@ -412,47 +422,13 @@ static inline void debug_desc(u32 phys, struct desc *desc)
 #endif
 }
 
-static inline void debug_queue(unsigned int queue, int is_get, u32 phys)
-{
-#if DEBUG_QUEUES
-	static struct {
-		int queue;
-		char *name;
-	} names[] = {
-		{ TX_QUEUE(0x10), "TX#0 " },
-		{ TX_QUEUE(0x20), "TX#1 " },
-		{ TX_QUEUE(0x00), "TX#2 " },
-		{ RXFREE_QUEUE(0x10), "RX-free#0 " },
-		{ RXFREE_QUEUE(0x20), "RX-free#1 " },
-		{ RXFREE_QUEUE(0x00), "RX-free#2 " },
-		{ TXDONE_QUEUE, "TX-done " },
-	};
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(names); i++)
-		if (names[i].queue == queue)
-			break;
-
-	printk(KERN_DEBUG "Queue %i %s%s %X\n", queue,
-	       i < ARRAY_SIZE(names) ? names[i].name : "",
-	       is_get ? "->" : "<-", phys);
-#endif
-}
-
-static inline u32 queue_get_entry(unsigned int queue)
-{
-	u32 phys = qmgr_get_entry(queue);
-	debug_queue(queue, 1, phys);
-	return phys;
-}
-
 static inline int queue_get_desc(unsigned int queue, struct port *port,
 				 int is_tx)
 {
 	u32 phys, tab_phys, n_desc;
 	struct desc *tab;
 
-	if (!(phys = queue_get_entry(queue)))
+	if (!(phys = qmgr_get_entry(queue)))
 		return -1;
 
 	phys &= ~0x1F; /* mask out non-address bits */
@@ -468,7 +444,6 @@ static inline int queue_get_desc(unsigned int queue, struct port *port,
 static inline void queue_put_desc(unsigned int queue, u32 phys,
 				  struct desc *desc)
 {
-	debug_queue(queue, 0, phys);
 	debug_desc(phys, desc);
 	BUG_ON(phys & 0x1F);
 	qmgr_put_entry(queue, phys);
@@ -562,7 +537,7 @@ static int eth_poll(struct napi_struct *napi, int budget)
 #endif
 
 		if (!skb) {
-			port->stat.rx_dropped++;
+			dev->stats.rx_dropped++;
 			/* put the desc back on RX-ready queue */
 			desc->buf_len = MAX_MRU;
 			desc->pkt_len = 0;
@@ -588,8 +563,8 @@ static int eth_poll(struct napi_struct *napi, int budget)
 		debug_pkt(dev, "eth_poll", skb->data, skb->len);
 
 		skb->protocol = eth_type_trans(skb, dev);
-		port->stat.rx_packets++;
-		port->stat.rx_bytes += skb->len;
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += skb->len;
 		netif_receive_skb(skb);
 
 		/* put the new buffer on RX-free queue */
@@ -617,7 +592,7 @@ static void eth_txdone_irq(void *unused)
 #if DEBUG_TX
 	printk(KERN_DEBUG DRV_NAME ": eth_txdone_irq\n");
 #endif
-	while ((phys = queue_get_entry(TXDONE_QUEUE)) != 0) {
+	while ((phys = qmgr_get_entry(TXDONE_QUEUE)) != 0) {
 		u32 npe_id, n_desc;
 		struct port *port;
 		struct desc *desc;
@@ -634,8 +609,8 @@ static void eth_txdone_irq(void *unused)
 		debug_desc(phys, desc);
 
 		if (port->tx_buff_tab[n_desc]) { /* not the draining packet */
-			port->stat.tx_packets++;
-			port->stat.tx_bytes += desc->pkt_len;
+			port->netdev->stats.tx_packets++;
+			port->netdev->stats.tx_bytes += desc->pkt_len;
 
 			dma_unmap_tx(port, desc);
 #if DEBUG_TX
@@ -673,7 +648,7 @@ static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	if (unlikely(skb->len > MAX_MRU)) {
 		dev_kfree_skb(skb);
-		port->stat.tx_errors++;
+		dev->stats.tx_errors++;
 		return NETDEV_TX_OK;
 	}
 
@@ -689,7 +664,7 @@ static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
 	bytes = ALIGN(offset + len, 4);
 	if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
 		dev_kfree_skb(skb);
-		port->stat.tx_dropped++;
+		dev->stats.tx_dropped++;
 		return NETDEV_TX_OK;
 	}
 	memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
@@ -703,7 +678,7 @@ static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
 #else
 		kfree(mem);
 #endif
-		port->stat.tx_dropped++;
+		dev->stats.tx_dropped++;
 		return NETDEV_TX_OK;
 	}
 
@@ -746,12 +721,6 @@ static int eth_xmit(struct sk_buff *skb, struct net_device *dev)
 }
 
 
-static struct net_device_stats *eth_stats(struct net_device *dev)
-{
-	struct port *port = netdev_priv(dev);
-	return &port->stat;
-}
-
 static void eth_set_mcast_list(struct net_device *dev)
 {
 	struct port *port = netdev_priv(dev);
@@ -785,41 +754,80 @@ static void eth_set_mcast_list(struct net_device *dev)
 static int eth_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
 {
 	struct port *port = netdev_priv(dev);
-	unsigned int duplex_chg;
-	int err;
 
 	if (!netif_running(dev))
 		return -EINVAL;
-	err = generic_mii_ioctl(&port->mii, if_mii(req), cmd, &duplex_chg);
-	if (duplex_chg)
-		eth_set_duplex(port);
-	return err;
+	return phy_mii_ioctl(port->phydev, if_mii(req), cmd);
+}
+
+/* ethtool support */
+
+static void ixp4xx_get_drvinfo(struct net_device *dev,
+			       struct ethtool_drvinfo *info)
+{
+	struct port *port = netdev_priv(dev);
+	strcpy(info->driver, DRV_NAME);
+	snprintf(info->fw_version, sizeof(info->fw_version), "%u:%u:%u:%u",
+		 port->firmware[0], port->firmware[1],
+		 port->firmware[2], port->firmware[3]);
+	strcpy(info->bus_info, "internal");
 }
 
+static int ixp4xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct port *port = netdev_priv(dev);
+	return phy_ethtool_gset(port->phydev, cmd);
+}
+
+static int ixp4xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+	struct port *port = netdev_priv(dev);
+	return phy_ethtool_sset(port->phydev, cmd);
+}
+
+static int ixp4xx_nway_reset(struct net_device *dev)
+{
+	struct port *port = netdev_priv(dev);
+	return phy_start_aneg(port->phydev);
+}
+
+static struct ethtool_ops ixp4xx_ethtool_ops = {
+	.get_drvinfo = ixp4xx_get_drvinfo,
+	.get_settings = ixp4xx_get_settings,
+	.set_settings = ixp4xx_set_settings,
+	.nway_reset = ixp4xx_nway_reset,
+	.get_link = ethtool_op_get_link,
+};
+
 
 static int request_queues(struct port *port)
 {
 	int err;
 
-	err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0);
+	err = qmgr_request_queue(RXFREE_QUEUE(port->id), RX_DESCS, 0, 0,
+			    "%s:RX-free", port->netdev->name);
 	if (err)
 		return err;
 
-	err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0);
+	err = qmgr_request_queue(port->plat->rxq, RX_DESCS, 0, 0,
+			    "%s:RX", port->netdev->name);
 	if (err)
 		goto rel_rxfree;
 
-	err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0);
+	err = qmgr_request_queue(TX_QUEUE(port->id), TX_DESCS, 0, 0,
+			    "%s:TX", port->netdev->name);
 	if (err)
 		goto rel_rx;
 
-	err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0);
+	err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0,
+			    "%s:TX-ready", port->netdev->name);
 	if (err)
 		goto rel_tx;
 
 	/* TX-done queue handles skbs sent out by the NPEs */
 	if (!ports_open) {
-		err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0);
+		err = qmgr_request_queue(TXDONE_QUEUE, TXDONE_QUEUE_LEN, 0, 0,
+				    "%s:TX-done", DRV_NAME);
 		if (err)
 			goto rel_txready;
 	}
@@ -943,10 +951,12 @@ static int eth_open(struct net_device *dev)
 			       npe_name(npe));
 			return -EIO;
 		}
+		port->firmware[0] = msg.byte4;
+		port->firmware[1] = msg.byte5;
+		port->firmware[2] = msg.byte6;
+		port->firmware[3] = msg.byte7;
 	}
 
-	mdio_write(dev, port->plat->phy, MII_BMCR, port->mii_bmcr);
-
 	memset(&msg, 0, sizeof(msg));
 	msg.cmd = NPE_VLAN_SETRXQOSENTRY;
 	msg.eth_id = port->id;
@@ -984,6 +994,9 @@ static int eth_open(struct net_device *dev)
 		return err;
 	}
 
+	port->speed = 0;	/* force "link up" message */
+	phy_start(port->phydev);
+
 	for (i = 0; i < ETH_ALEN; i++)
 		__raw_writel(dev->dev_addr[i], &port->regs->hw_addr[i]);
 	__raw_writel(0x08, &port->regs->random_seed);
@@ -1011,10 +1024,8 @@ static int eth_open(struct net_device *dev)
 	__raw_writel(DEFAULT_RX_CNTRL0, &port->regs->rx_control[0]);
 
 	napi_enable(&port->napi);
-	phy_check_media(port, 1);
 	eth_set_mcast_list(dev);
 	netif_start_queue(dev);
-	schedule_delayed_work(&port->mdio_thread, MDIO_INTERVAL);
 
 	qmgr_set_irq(port->plat->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
 		     eth_rx_irq, dev);
@@ -1105,25 +1116,31 @@ static int eth_close(struct net_device *dev)
 		printk(KERN_CRIT "%s: unable to disable loopback\n",
 		       dev->name);
 
-	port->mii_bmcr = mdio_read(dev, port->plat->phy, MII_BMCR) &
-		~(BMCR_RESET | BMCR_PDOWN); /* may have been altered */
-	mdio_write(dev, port->plat->phy, MII_BMCR,
-		   port->mii_bmcr | BMCR_PDOWN);
+	phy_stop(port->phydev);
 
 	if (!ports_open)
 		qmgr_disable_irq(TXDONE_QUEUE);
-	cancel_rearming_delayed_work(&port->mdio_thread);
 	destroy_queues(port);
 	release_queues(port);
 	return 0;
 }
 
+static const struct net_device_ops ixp4xx_netdev_ops = {
+	.ndo_open = eth_open,
+	.ndo_stop = eth_close,
+	.ndo_start_xmit = eth_xmit,
+	.ndo_set_multicast_list = eth_set_mcast_list,
+	.ndo_do_ioctl = eth_ioctl,
+
+};
+
 static int __devinit eth_init_one(struct platform_device *pdev)
 {
 	struct port *port;
 	struct net_device *dev;
 	struct eth_plat_info *plat = pdev->dev.platform_data;
 	u32 regs_phys;
+	char phy_id[BUS_ID_SIZE];
 	int err;
 
 	if (!(dev = alloc_etherdev(sizeof(struct port))))
@@ -1152,12 +1169,8 @@ static int __devinit eth_init_one(struct platform_device *pdev)
 		goto err_free;
 	}
 
-	dev->open = eth_open;
-	dev->hard_start_xmit = eth_xmit;
-	dev->stop = eth_close;
-	dev->get_stats = eth_stats;
-	dev->do_ioctl = eth_ioctl;
-	dev->set_multicast_list = eth_set_mcast_list;
+	dev->netdev_ops = &ixp4xx_netdev_ops;
+	dev->ethtool_ops = &ixp4xx_ethtool_ops;
 	dev->tx_queue_len = 100;
 
 	netif_napi_add(dev, &port->napi, eth_poll, NAPI_WEIGHT);
@@ -1190,22 +1203,19 @@ static int __devinit eth_init_one(struct platform_device *pdev)
 	__raw_writel(DEFAULT_CORE_CNTRL, &port->regs->core_control);
 	udelay(50);
 
-	port->mii.dev = dev;
-	port->mii.mdio_read = mdio_read;
-	port->mii.mdio_write = mdio_write;
-	port->mii.phy_id = plat->phy;
-	port->mii.phy_id_mask = 0x1F;
-	port->mii.reg_num_mask = 0x1F;
+	snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT, "0", plat->phy);
+	port->phydev = phy_connect(dev, phy_id, &ixp4xx_adjust_link, 0,
+				   PHY_INTERFACE_MODE_MII);
+	if (IS_ERR(port->phydev)) {
+		printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
+		return PTR_ERR(port->phydev);
+	}
+
+	port->phydev->irq = PHY_POLL;
 
 	printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy,
 	       npe_name(port->npe));
 
-	phy_reset(dev, plat->phy);
-	port->mii_bmcr = mdio_read(dev, plat->phy, MII_BMCR) &
-		~(BMCR_RESET | BMCR_PDOWN);
-	mdio_write(dev, plat->phy, MII_BMCR, port->mii_bmcr | BMCR_PDOWN);
-
-	INIT_DELAYED_WORK(&port->mdio_thread, mdio_thread);
 	return 0;
 
 err_unreg:
@@ -1231,7 +1241,7 @@ static int __devexit eth_remove_one(struct platform_device *pdev)
 	return 0;
 }
 
-static struct platform_driver drv = {
+static struct platform_driver ixp4xx_eth_driver = {
 	.driver.name	= DRV_NAME,
 	.probe		= eth_init_one,
 	.remove		= eth_remove_one,
@@ -1239,20 +1249,19 @@ static struct platform_driver drv = {
 
 static int __init eth_init_module(void)
 {
+	int err;
 	if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
 		return -ENOSYS;
 
-	/* All MII PHY accesses use NPE-B Ethernet registers */
-	spin_lock_init(&mdio_lock);
-	mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
-	__raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
-
-	return platform_driver_register(&drv);
+	if ((err = ixp4xx_mdio_register()))
+		return err;
+	return platform_driver_register(&ixp4xx_eth_driver);
 }
 
 static void __exit eth_cleanup_module(void)
 {
-	platform_driver_unregister(&drv);
+	platform_driver_unregister(&ixp4xx_eth_driver);
+	ixp4xx_mdio_remove();
 }
 
 MODULE_AUTHOR("Krzysztof Halasa");
diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig
index 0725161aa27c..d08ce6a264cb 100644
--- a/drivers/net/wan/Kconfig
+++ b/drivers/net/wan/Kconfig
@@ -335,6 +335,13 @@ config DSCC4_PCI_RST
 
 	  Say Y if your card supports this feature.
 
+config IXP4XX_HSS
+	tristate "Intel IXP4xx HSS (synchronous serial port) support"
+	depends on HDLC && ARM && ARCH_IXP4XX && IXP4XX_NPE && IXP4XX_QMGR
+	help
+	  Say Y here if you want to use built-in HSS ports
+	  on IXP4xx processor.
+
 config DLCI
 	tristate "Frame Relay DLCI support"
 	---help---
diff --git a/drivers/net/wan/Makefile b/drivers/net/wan/Makefile
index cec16818a130..19d14bc28356 100644
--- a/drivers/net/wan/Makefile
+++ b/drivers/net/wan/Makefile
@@ -41,6 +41,7 @@ obj-$(CONFIG_C101)		+= c101.o
 obj-$(CONFIG_WANXL)		+= wanxl.o
 obj-$(CONFIG_PCI200SYN)		+= pci200syn.o
 obj-$(CONFIG_PC300TOO)		+= pc300too.o
+obj-$(CONFIG_IXP4XX_HSS)	+= ixp4xx_hss.o
 
 clean-files := wanxlfw.inc
 $(obj)/wanxl.o:	$(obj)/wanxlfw.inc
diff --git a/drivers/net/wan/hdlc_ppp.c b/drivers/net/wan/hdlc_ppp.c
index 72fae217f1c4..57fe714c1c7f 100644
--- a/drivers/net/wan/hdlc_ppp.c
+++ b/drivers/net/wan/hdlc_ppp.c
@@ -303,7 +303,7 @@ static int cp_table[EVENTS][STATES] = {
    STA: RTR must supply id
    SCJ: RUC must supply CP packet len and data */
 static void ppp_cp_event(struct net_device *dev, u16 pid, u16 event, u8 code,
-			 u8 id, unsigned int len, void *data)
+			 u8 id, unsigned int len, const void *data)
 {
 	int old_state, action;
 	struct ppp *ppp = get_ppp(dev);
@@ -374,11 +374,12 @@ static void ppp_cp_event(struct net_device *dev, u16 pid, u16 event, u8 code,
 
 
 static void ppp_cp_parse_cr(struct net_device *dev, u16 pid, u8 id,
-			    unsigned int len, u8 *data)
+			    unsigned int req_len, const u8 *data)
 {
 	static u8 const valid_accm[6] = { LCP_OPTION_ACCM, 6, 0, 0, 0, 0 };
-	u8 *opt, *out;
-	unsigned int nak_len = 0, rej_len = 0;
+	const u8 *opt;
+	u8 *out;
+	unsigned int len = req_len, nak_len = 0, rej_len = 0;
 
 	if (!(out = kmalloc(len, GFP_ATOMIC))) {
 		dev->stats.rx_dropped++;
@@ -423,7 +424,7 @@ static void ppp_cp_parse_cr(struct net_device *dev, u16 pid, u8 id,
 	else if (nak_len)
 		ppp_cp_event(dev, pid, RCR_BAD, CP_CONF_NAK, id, nak_len, out);
 	else
-		ppp_cp_event(dev, pid, RCR_GOOD, CP_CONF_ACK, id, len, data);
+		ppp_cp_event(dev, pid, RCR_GOOD, CP_CONF_ACK, id, req_len, data);
 
 	kfree(out);
 }
diff --git a/drivers/net/wan/ixp4xx_hss.c b/drivers/net/wan/ixp4xx_hss.c
new file mode 100644
index 000000000000..0c6802507a79
--- /dev/null
+++ b/drivers/net/wan/ixp4xx_hss.c
@@ -0,0 +1,1325 @@
+/*
+ * Intel IXP4xx HSS (synchronous serial port) driver for Linux
+ *
+ * Copyright (C) 2007-2008 Krzysztof Hałasa <khc@pm.waw.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/bitops.h>
+#include <linux/cdev.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/fs.h>
+#include <linux/hdlc.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/poll.h>
+#include <mach/npe.h>
+#include <mach/qmgr.h>
+
+#define DEBUG_DESC		0
+#define DEBUG_RX		0
+#define DEBUG_TX		0
+#define DEBUG_PKT_BYTES		0
+#define DEBUG_CLOSE		0
+
+#define DRV_NAME		"ixp4xx_hss"
+
+#define PKT_EXTRA_FLAGS		0 /* orig 1 */
+#define PKT_NUM_PIPES		1 /* 1, 2 or 4 */
+#define PKT_PIPE_FIFO_SIZEW	4 /* total 4 dwords per HSS */
+
+#define RX_DESCS		16 /* also length of all RX queues */
+#define TX_DESCS		16 /* also length of all TX queues */
+
+#define POOL_ALLOC_SIZE		(sizeof(struct desc) * (RX_DESCS + TX_DESCS))
+#define RX_SIZE			(HDLC_MAX_MRU + 4) /* NPE needs more space */
+#define MAX_CLOSE_WAIT		1000 /* microseconds */
+#define HSS_COUNT		2
+#define FRAME_SIZE		256 /* doesn't matter at this point */
+#define FRAME_OFFSET		0
+#define MAX_CHANNELS		(FRAME_SIZE / 8)
+
+#define NAPI_WEIGHT		16
+
+/* Queue IDs */
+#define HSS0_CHL_RXTRIG_QUEUE	12	/* orig size = 32 dwords */
+#define HSS0_PKT_RX_QUEUE	13	/* orig size = 32 dwords */
+#define HSS0_PKT_TX0_QUEUE	14	/* orig size = 16 dwords */
+#define HSS0_PKT_TX1_QUEUE	15
+#define HSS0_PKT_TX2_QUEUE	16
+#define HSS0_PKT_TX3_QUEUE	17
+#define HSS0_PKT_RXFREE0_QUEUE	18	/* orig size = 16 dwords */
+#define HSS0_PKT_RXFREE1_QUEUE	19
+#define HSS0_PKT_RXFREE2_QUEUE	20
+#define HSS0_PKT_RXFREE3_QUEUE	21
+#define HSS0_PKT_TXDONE_QUEUE	22	/* orig size = 64 dwords */
+
+#define HSS1_CHL_RXTRIG_QUEUE	10
+#define HSS1_PKT_RX_QUEUE	0
+#define HSS1_PKT_TX0_QUEUE	5
+#define HSS1_PKT_TX1_QUEUE	6
+#define HSS1_PKT_TX2_QUEUE	7
+#define HSS1_PKT_TX3_QUEUE	8
+#define HSS1_PKT_RXFREE0_QUEUE	1
+#define HSS1_PKT_RXFREE1_QUEUE	2
+#define HSS1_PKT_RXFREE2_QUEUE	3
+#define HSS1_PKT_RXFREE3_QUEUE	4
+#define HSS1_PKT_TXDONE_QUEUE	9
+
+#define NPE_PKT_MODE_HDLC		0
+#define NPE_PKT_MODE_RAW		1
+#define NPE_PKT_MODE_56KMODE		2
+#define NPE_PKT_MODE_56KENDIAN_MSB	4
+
+/* PKT_PIPE_HDLC_CFG_WRITE flags */
+#define PKT_HDLC_IDLE_ONES		0x1 /* default = flags */
+#define PKT_HDLC_CRC_32			0x2 /* default = CRC-16 */
+#define PKT_HDLC_MSB_ENDIAN		0x4 /* default = LE */
+
+
+/* hss_config, PCRs */
+/* Frame sync sampling, default = active low */
+#define PCR_FRM_SYNC_ACTIVE_HIGH	0x40000000
+#define PCR_FRM_SYNC_FALLINGEDGE	0x80000000
+#define PCR_FRM_SYNC_RISINGEDGE		0xC0000000
+
+/* Frame sync pin: input (default) or output generated off a given clk edge */
+#define PCR_FRM_SYNC_OUTPUT_FALLING	0x20000000
+#define PCR_FRM_SYNC_OUTPUT_RISING	0x30000000
+
+/* Frame and data clock sampling on edge, default = falling */
+#define PCR_FCLK_EDGE_RISING		0x08000000
+#define PCR_DCLK_EDGE_RISING		0x04000000
+
+/* Clock direction, default = input */
+#define PCR_SYNC_CLK_DIR_OUTPUT		0x02000000
+
+/* Generate/Receive frame pulses, default = enabled */
+#define PCR_FRM_PULSE_DISABLED		0x01000000
+
+ /* Data rate is full (default) or half the configured clk speed */
+#define PCR_HALF_CLK_RATE		0x00200000
+
+/* Invert data between NPE and HSS FIFOs? (default = no) */
+#define PCR_DATA_POLARITY_INVERT	0x00100000
+
+/* TX/RX endianness, default = LSB */
+#define PCR_MSB_ENDIAN			0x00080000
+
+/* Normal (default) / open drain mode (TX only) */
+#define PCR_TX_PINS_OPEN_DRAIN		0x00040000
+
+/* No framing bit transmitted and expected on RX? (default = framing bit) */
+#define PCR_SOF_NO_FBIT			0x00020000
+
+/* Drive data pins? */
+#define PCR_TX_DATA_ENABLE		0x00010000
+
+/* Voice 56k type: drive the data pins low (default), high, high Z */
+#define PCR_TX_V56K_HIGH		0x00002000
+#define PCR_TX_V56K_HIGH_IMP		0x00004000
+
+/* Unassigned type: drive the data pins low (default), high, high Z */
+#define PCR_TX_UNASS_HIGH		0x00000800
+#define PCR_TX_UNASS_HIGH_IMP		0x00001000
+
+/* T1 @ 1.544MHz only: Fbit dictated in FIFO (default) or high Z */
+#define PCR_TX_FB_HIGH_IMP		0x00000400
+
+/* 56k data endiannes - which bit unused: high (default) or low */
+#define PCR_TX_56KE_BIT_0_UNUSED	0x00000200
+
+/* 56k data transmission type: 32/8 bit data (default) or 56K data */
+#define PCR_TX_56KS_56K_DATA		0x00000100
+
+/* hss_config, cCR */
+/* Number of packetized clients, default = 1 */
+#define CCR_NPE_HFIFO_2_HDLC		0x04000000
+#define CCR_NPE_HFIFO_3_OR_4HDLC	0x08000000
+
+/* default = no loopback */
+#define CCR_LOOPBACK			0x02000000
+
+/* HSS number, default = 0 (first) */
+#define CCR_SECOND_HSS			0x01000000
+
+
+/* hss_config, clkCR: main:10, num:10, denom:12 */
+#define CLK42X_SPEED_EXP	((0x3FF << 22) | (  2 << 12) |   15) /*65 KHz*/
+
+#define CLK42X_SPEED_512KHZ	((  130 << 22) | (  2 << 12) |   15)
+#define CLK42X_SPEED_1536KHZ	((   43 << 22) | ( 18 << 12) |   47)
+#define CLK42X_SPEED_1544KHZ	((   43 << 22) | ( 33 << 12) |  192)
+#define CLK42X_SPEED_2048KHZ	((   32 << 22) | ( 34 << 12) |   63)
+#define CLK42X_SPEED_4096KHZ	((   16 << 22) | ( 34 << 12) |  127)
+#define CLK42X_SPEED_8192KHZ	((    8 << 22) | ( 34 << 12) |  255)
+
+#define CLK46X_SPEED_512KHZ	((  130 << 22) | ( 24 << 12) |  127)
+#define CLK46X_SPEED_1536KHZ	((   43 << 22) | (152 << 12) |  383)
+#define CLK46X_SPEED_1544KHZ	((   43 << 22) | ( 66 << 12) |  385)
+#define CLK46X_SPEED_2048KHZ	((   32 << 22) | (280 << 12) |  511)
+#define CLK46X_SPEED_4096KHZ	((   16 << 22) | (280 << 12) | 1023)
+#define CLK46X_SPEED_8192KHZ	((    8 << 22) | (280 << 12) | 2047)
+
+
+/* hss_config, LUT entries */
+#define TDMMAP_UNASSIGNED	0
+#define TDMMAP_HDLC		1	/* HDLC - packetized */
+#define TDMMAP_VOICE56K		2	/* Voice56K - 7-bit channelized */
+#define TDMMAP_VOICE64K		3	/* Voice64K - 8-bit channelized */
+
+/* offsets into HSS config */
+#define HSS_CONFIG_TX_PCR	0x00 /* port configuration registers */
+#define HSS_CONFIG_RX_PCR	0x04
+#define HSS_CONFIG_CORE_CR	0x08 /* loopback control, HSS# */
+#define HSS_CONFIG_CLOCK_CR	0x0C /* clock generator control */
+#define HSS_CONFIG_TX_FCR	0x10 /* frame configuration registers */
+#define HSS_CONFIG_RX_FCR	0x14
+#define HSS_CONFIG_TX_LUT	0x18 /* channel look-up tables */
+#define HSS_CONFIG_RX_LUT	0x38
+
+
+/* NPE command codes */
+/* writes the ConfigWord value to the location specified by offset */
+#define PORT_CONFIG_WRITE		0x40
+
+/* triggers the NPE to load the contents of the configuration table */
+#define PORT_CONFIG_LOAD		0x41
+
+/* triggers the NPE to return an HssErrorReadResponse message */
+#define PORT_ERROR_READ			0x42
+
+/* triggers the NPE to reset internal status and enable the HssPacketized
+   operation for the flow specified by pPipe */
+#define PKT_PIPE_FLOW_ENABLE		0x50
+#define PKT_PIPE_FLOW_DISABLE		0x51
+#define PKT_NUM_PIPES_WRITE		0x52
+#define PKT_PIPE_FIFO_SIZEW_WRITE	0x53
+#define PKT_PIPE_HDLC_CFG_WRITE		0x54
+#define PKT_PIPE_IDLE_PATTERN_WRITE	0x55
+#define PKT_PIPE_RX_SIZE_WRITE		0x56
+#define PKT_PIPE_MODE_WRITE		0x57
+
+/* HDLC packet status values - desc->status */
+#define ERR_SHUTDOWN		1 /* stop or shutdown occurrance */
+#define ERR_HDLC_ALIGN		2 /* HDLC alignment error */
+#define ERR_HDLC_FCS		3 /* HDLC Frame Check Sum error */
+#define ERR_RXFREE_Q_EMPTY	4 /* RX-free queue became empty while receiving
+				     this packet (if buf_len < pkt_len) */
+#define ERR_HDLC_TOO_LONG	5 /* HDLC frame size too long */
+#define ERR_HDLC_ABORT		6 /* abort sequence received */
+#define ERR_DISCONNECTING	7 /* disconnect is in progress */
+
+
+#ifdef __ARMEB__
+typedef struct sk_buff buffer_t;
+#define free_buffer dev_kfree_skb
+#define free_buffer_irq dev_kfree_skb_irq
+#else
+typedef void buffer_t;
+#define free_buffer kfree
+#define free_buffer_irq kfree
+#endif
+
+struct port {
+	struct device *dev;
+	struct npe *npe;
+	struct net_device *netdev;
+	struct napi_struct napi;
+	struct hss_plat_info *plat;
+	buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
+	struct desc *desc_tab;	/* coherent */
+	u32 desc_tab_phys;
+	unsigned int id;
+	unsigned int clock_type, clock_rate, loopback;
+	unsigned int initialized, carrier;
+	u8 hdlc_cfg;
+};
+
+/* NPE message structure */
+struct msg {
+#ifdef __ARMEB__
+	u8 cmd, unused, hss_port, index;
+	union {
+		struct { u8 data8a, data8b, data8c, data8d; };
+		struct { u16 data16a, data16b; };
+		struct { u32 data32; };
+	};
+#else
+	u8 index, hss_port, unused, cmd;
+	union {
+		struct { u8 data8d, data8c, data8b, data8a; };
+		struct { u16 data16b, data16a; };
+		struct { u32 data32; };
+	};
+#endif
+};
+
+/* HDLC packet descriptor */
+struct desc {
+	u32 next;		/* pointer to next buffer, unused */
+
+#ifdef __ARMEB__
+	u16 buf_len;		/* buffer length */
+	u16 pkt_len;		/* packet length */
+	u32 data;		/* pointer to data buffer in RAM */
+	u8 status;
+	u8 error_count;
+	u16 __reserved;
+#else
+	u16 pkt_len;		/* packet length */
+	u16 buf_len;		/* buffer length */
+	u32 data;		/* pointer to data buffer in RAM */
+	u16 __reserved;
+	u8 error_count;
+	u8 status;
+#endif
+	u32 __reserved1[4];
+};
+
+
+#define rx_desc_phys(port, n)	((port)->desc_tab_phys +		\
+				 (n) * sizeof(struct desc))
+#define rx_desc_ptr(port, n)	(&(port)->desc_tab[n])
+
+#define tx_desc_phys(port, n)	((port)->desc_tab_phys +		\
+				 ((n) + RX_DESCS) * sizeof(struct desc))
+#define tx_desc_ptr(port, n)	(&(port)->desc_tab[(n) + RX_DESCS])
+
+/*****************************************************************************
+ * global variables
+ ****************************************************************************/
+
+static int ports_open;
+static struct dma_pool *dma_pool;
+static spinlock_t npe_lock;
+
+static const struct {
+	int tx, txdone, rx, rxfree;
+}queue_ids[2] = {{HSS0_PKT_TX0_QUEUE, HSS0_PKT_TXDONE_QUEUE, HSS0_PKT_RX_QUEUE,
+		  HSS0_PKT_RXFREE0_QUEUE},
+		 {HSS1_PKT_TX0_QUEUE, HSS1_PKT_TXDONE_QUEUE, HSS1_PKT_RX_QUEUE,
+		  HSS1_PKT_RXFREE0_QUEUE},
+};
+
+/*****************************************************************************
+ * utility functions
+ ****************************************************************************/
+
+static inline struct port* dev_to_port(struct net_device *dev)
+{
+	return dev_to_hdlc(dev)->priv;
+}
+
+#ifndef __ARMEB__
+static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
+{
+	int i;
+	for (i = 0; i < cnt; i++)
+		dest[i] = swab32(src[i]);
+}
+#endif
+
+/*****************************************************************************
+ * HSS access
+ ****************************************************************************/
+
+static void hss_npe_send(struct port *port, struct msg *msg, const char* what)
+{
+	u32 *val = (u32*)msg;
+	if (npe_send_message(port->npe, msg, what)) {
+		printk(KERN_CRIT "HSS-%i: unable to send command [%08X:%08X]"
+		       " to %s\n", port->id, val[0], val[1],
+		       npe_name(port->npe));
+		BUG();
+	}
+}
+
+static void hss_config_set_lut(struct port *port)
+{
+	struct msg msg;
+	int ch;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PORT_CONFIG_WRITE;
+	msg.hss_port = port->id;
+
+	for (ch = 0; ch < MAX_CHANNELS; ch++) {
+		msg.data32 >>= 2;
+		msg.data32 |= TDMMAP_HDLC << 30;
+
+		if (ch % 16 == 15) {
+			msg.index = HSS_CONFIG_TX_LUT + ((ch / 4) & ~3);
+			hss_npe_send(port, &msg, "HSS_SET_TX_LUT");
+
+			msg.index += HSS_CONFIG_RX_LUT - HSS_CONFIG_TX_LUT;
+			hss_npe_send(port, &msg, "HSS_SET_RX_LUT");
+		}
+	}
+}
+
+static void hss_config(struct port *port)
+{
+	struct msg msg;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PORT_CONFIG_WRITE;
+	msg.hss_port = port->id;
+	msg.index = HSS_CONFIG_TX_PCR;
+	msg.data32 = PCR_FRM_SYNC_OUTPUT_RISING | PCR_MSB_ENDIAN |
+		PCR_TX_DATA_ENABLE | PCR_SOF_NO_FBIT;
+	if (port->clock_type == CLOCK_INT)
+		msg.data32 |= PCR_SYNC_CLK_DIR_OUTPUT;
+	hss_npe_send(port, &msg, "HSS_SET_TX_PCR");
+
+	msg.index = HSS_CONFIG_RX_PCR;
+	msg.data32 ^= PCR_TX_DATA_ENABLE | PCR_DCLK_EDGE_RISING;
+	hss_npe_send(port, &msg, "HSS_SET_RX_PCR");
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PORT_CONFIG_WRITE;
+	msg.hss_port = port->id;
+	msg.index = HSS_CONFIG_CORE_CR;
+	msg.data32 = (port->loopback ? CCR_LOOPBACK : 0) |
+		(port->id ? CCR_SECOND_HSS : 0);
+	hss_npe_send(port, &msg, "HSS_SET_CORE_CR");
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PORT_CONFIG_WRITE;
+	msg.hss_port = port->id;
+	msg.index = HSS_CONFIG_CLOCK_CR;
+	msg.data32 = CLK42X_SPEED_2048KHZ /* FIXME */;
+	hss_npe_send(port, &msg, "HSS_SET_CLOCK_CR");
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PORT_CONFIG_WRITE;
+	msg.hss_port = port->id;
+	msg.index = HSS_CONFIG_TX_FCR;
+	msg.data16a = FRAME_OFFSET;
+	msg.data16b = FRAME_SIZE - 1;
+	hss_npe_send(port, &msg, "HSS_SET_TX_FCR");
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PORT_CONFIG_WRITE;
+	msg.hss_port = port->id;
+	msg.index = HSS_CONFIG_RX_FCR;
+	msg.data16a = FRAME_OFFSET;
+	msg.data16b = FRAME_SIZE - 1;
+	hss_npe_send(port, &msg, "HSS_SET_RX_FCR");
+
+	hss_config_set_lut(port);
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PORT_CONFIG_LOAD;
+	msg.hss_port = port->id;
+	hss_npe_send(port, &msg, "HSS_LOAD_CONFIG");
+
+	if (npe_recv_message(port->npe, &msg, "HSS_LOAD_CONFIG") ||
+	    /* HSS_LOAD_CONFIG for port #1 returns port_id = #4 */
+	    msg.cmd != PORT_CONFIG_LOAD || msg.data32) {
+		printk(KERN_CRIT "HSS-%i: HSS_LOAD_CONFIG failed\n",
+		       port->id);
+		BUG();
+	}
+
+	/* HDLC may stop working without this - check FIXME */
+	npe_recv_message(port->npe, &msg, "FLUSH_IT");
+}
+
+static void hss_set_hdlc_cfg(struct port *port)
+{
+	struct msg msg;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PKT_PIPE_HDLC_CFG_WRITE;
+	msg.hss_port = port->id;
+	msg.data8a = port->hdlc_cfg; /* rx_cfg */
+	msg.data8b = port->hdlc_cfg | (PKT_EXTRA_FLAGS << 3); /* tx_cfg */
+	hss_npe_send(port, &msg, "HSS_SET_HDLC_CFG");
+}
+
+static u32 hss_get_status(struct port *port)
+{
+	struct msg msg;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PORT_ERROR_READ;
+	msg.hss_port = port->id;
+	hss_npe_send(port, &msg, "PORT_ERROR_READ");
+	if (npe_recv_message(port->npe, &msg, "PORT_ERROR_READ")) {
+		printk(KERN_CRIT "HSS-%i: unable to read HSS status\n",
+		       port->id);
+		BUG();
+	}
+
+	return msg.data32;
+}
+
+static void hss_start_hdlc(struct port *port)
+{
+	struct msg msg;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PKT_PIPE_FLOW_ENABLE;
+	msg.hss_port = port->id;
+	msg.data32 = 0;
+	hss_npe_send(port, &msg, "HSS_ENABLE_PKT_PIPE");
+}
+
+static void hss_stop_hdlc(struct port *port)
+{
+	struct msg msg;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PKT_PIPE_FLOW_DISABLE;
+	msg.hss_port = port->id;
+	hss_npe_send(port, &msg, "HSS_DISABLE_PKT_PIPE");
+	hss_get_status(port); /* make sure it's halted */
+}
+
+static int hss_load_firmware(struct port *port)
+{
+	struct msg msg;
+	int err;
+
+	if (port->initialized)
+		return 0;
+
+	if (!npe_running(port->npe) &&
+	    (err = npe_load_firmware(port->npe, npe_name(port->npe),
+				     port->dev)))
+		return err;
+
+	/* HDLC mode configuration */
+	memset(&msg, 0, sizeof(msg));
+	msg.cmd = PKT_NUM_PIPES_WRITE;
+	msg.hss_port = port->id;
+	msg.data8a = PKT_NUM_PIPES;
+	hss_npe_send(port, &msg, "HSS_SET_PKT_PIPES");
+
+	msg.cmd = PKT_PIPE_FIFO_SIZEW_WRITE;
+	msg.data8a = PKT_PIPE_FIFO_SIZEW;
+	hss_npe_send(port, &msg, "HSS_SET_PKT_FIFO");
+
+	msg.cmd = PKT_PIPE_MODE_WRITE;
+	msg.data8a = NPE_PKT_MODE_HDLC;
+	/* msg.data8b = inv_mask */
+	/* msg.data8c = or_mask */
+	hss_npe_send(port, &msg, "HSS_SET_PKT_MODE");
+
+	msg.cmd = PKT_PIPE_RX_SIZE_WRITE;
+	msg.data16a = HDLC_MAX_MRU; /* including CRC */
+	hss_npe_send(port, &msg, "HSS_SET_PKT_RX_SIZE");
+
+	msg.cmd = PKT_PIPE_IDLE_PATTERN_WRITE;
+	msg.data32 = 0x7F7F7F7F; /* ??? FIXME */
+	hss_npe_send(port, &msg, "HSS_SET_PKT_IDLE");
+
+	port->initialized = 1;
+	return 0;
+}
+
+/*****************************************************************************
+ * packetized (HDLC) operation
+ ****************************************************************************/
+
+static inline void debug_pkt(struct net_device *dev, const char *func,
+			     u8 *data, int len)
+{
+#if DEBUG_PKT_BYTES
+	int i;
+
+	printk(KERN_DEBUG "%s: %s(%i)", dev->name, func, len);
+	for (i = 0; i < len; i++) {
+		if (i >= DEBUG_PKT_BYTES)
+			break;
+		printk("%s%02X", !(i % 4) ? " " : "", data[i]);
+	}
+	printk("\n");
+#endif
+}
+
+
+static inline void debug_desc(u32 phys, struct desc *desc)
+{
+#if DEBUG_DESC
+	printk(KERN_DEBUG "%X: %X %3X %3X %08X %X %X\n",
+	       phys, desc->next, desc->buf_len, desc->pkt_len,
+	       desc->data, desc->status, desc->error_count);
+#endif
+}
+
+static inline int queue_get_desc(unsigned int queue, struct port *port,
+				 int is_tx)
+{
+	u32 phys, tab_phys, n_desc;
+	struct desc *tab;
+
+	if (!(phys = qmgr_get_entry(queue)))
+		return -1;
+
+	BUG_ON(phys & 0x1F);
+	tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
+	tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
+	n_desc = (phys - tab_phys) / sizeof(struct desc);
+	BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
+	debug_desc(phys, &tab[n_desc]);
+	BUG_ON(tab[n_desc].next);
+	return n_desc;
+}
+
+static inline void queue_put_desc(unsigned int queue, u32 phys,
+				  struct desc *desc)
+{
+	debug_desc(phys, desc);
+	BUG_ON(phys & 0x1F);
+	qmgr_put_entry(queue, phys);
+	BUG_ON(qmgr_stat_overflow(queue));
+}
+
+
+static inline void dma_unmap_tx(struct port *port, struct desc *desc)
+{
+#ifdef __ARMEB__
+	dma_unmap_single(&port->netdev->dev, desc->data,
+			 desc->buf_len, DMA_TO_DEVICE);
+#else
+	dma_unmap_single(&port->netdev->dev, desc->data & ~3,
+			 ALIGN((desc->data & 3) + desc->buf_len, 4),
+			 DMA_TO_DEVICE);
+#endif
+}
+
+
+static void hss_hdlc_set_carrier(void *pdev, int carrier)
+{
+	struct net_device *netdev = pdev;
+	struct port *port = dev_to_port(netdev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&npe_lock, flags);
+	port->carrier = carrier;
+	if (!port->loopback) {
+		if (carrier)
+			netif_carrier_on(netdev);
+		else
+			netif_carrier_off(netdev);
+	}
+	spin_unlock_irqrestore(&npe_lock, flags);
+}
+
+static void hss_hdlc_rx_irq(void *pdev)
+{
+	struct net_device *dev = pdev;
+	struct port *port = dev_to_port(dev);
+
+#if DEBUG_RX
+	printk(KERN_DEBUG "%s: hss_hdlc_rx_irq\n", dev->name);
+#endif
+	qmgr_disable_irq(queue_ids[port->id].rx);
+	netif_rx_schedule(dev, &port->napi);
+}
+
+static int hss_hdlc_poll(struct napi_struct *napi, int budget)
+{
+	struct port *port = container_of(napi, struct port, napi);
+	struct net_device *dev = port->netdev;
+	unsigned int rxq = queue_ids[port->id].rx;
+	unsigned int rxfreeq = queue_ids[port->id].rxfree;
+	int received = 0;
+
+#if DEBUG_RX
+	printk(KERN_DEBUG "%s: hss_hdlc_poll\n", dev->name);
+#endif
+
+	while (received < budget) {
+		struct sk_buff *skb;
+		struct desc *desc;
+		int n;
+#ifdef __ARMEB__
+		struct sk_buff *temp;
+		u32 phys;
+#endif
+
+		if ((n = queue_get_desc(rxq, port, 0)) < 0) {
+#if DEBUG_RX
+			printk(KERN_DEBUG "%s: hss_hdlc_poll"
+			       " netif_rx_complete\n", dev->name);
+#endif
+			netif_rx_complete(dev, napi);
+			qmgr_enable_irq(rxq);
+			if (!qmgr_stat_empty(rxq) &&
+			    netif_rx_reschedule(dev, napi)) {
+#if DEBUG_RX
+				printk(KERN_DEBUG "%s: hss_hdlc_poll"
+				       " netif_rx_reschedule succeeded\n",
+				       dev->name);
+#endif
+				qmgr_disable_irq(rxq);
+				continue;
+			}
+#if DEBUG_RX
+			printk(KERN_DEBUG "%s: hss_hdlc_poll all done\n",
+			       dev->name);
+#endif
+			return received; /* all work done */
+		}
+
+		desc = rx_desc_ptr(port, n);
+#if 0 /* FIXME - error_count counts modulo 256, perhaps we should use it */
+		if (desc->error_count)
+			printk(KERN_DEBUG "%s: hss_hdlc_poll status 0x%02X"
+			       " errors %u\n", dev->name, desc->status,
+			       desc->error_count);
+#endif
+		skb = NULL;
+		switch (desc->status) {
+		case 0:
+#ifdef __ARMEB__
+			if ((skb = netdev_alloc_skb(dev, RX_SIZE)) != NULL) {
+				phys = dma_map_single(&dev->dev, skb->data,
+						      RX_SIZE,
+						      DMA_FROM_DEVICE);
+				if (dma_mapping_error(&dev->dev, phys)) {
+					dev_kfree_skb(skb);
+					skb = NULL;
+				}
+			}
+#else
+			skb = netdev_alloc_skb(dev, desc->pkt_len);
+#endif
+			if (!skb)
+				dev->stats.rx_dropped++;
+			break;
+		case ERR_HDLC_ALIGN:
+		case ERR_HDLC_ABORT:
+			dev->stats.rx_frame_errors++;
+			dev->stats.rx_errors++;
+			break;
+		case ERR_HDLC_FCS:
+			dev->stats.rx_crc_errors++;
+			dev->stats.rx_errors++;
+			break;
+		case ERR_HDLC_TOO_LONG:
+			dev->stats.rx_length_errors++;
+			dev->stats.rx_errors++;
+			break;
+		default:	/* FIXME - remove printk */
+			printk(KERN_ERR "%s: hss_hdlc_poll: status 0x%02X"
+			       " errors %u\n", dev->name, desc->status,
+			       desc->error_count);
+			dev->stats.rx_errors++;
+		}
+
+		if (!skb) {
+			/* put the desc back on RX-ready queue */
+			desc->buf_len = RX_SIZE;
+			desc->pkt_len = desc->status = 0;
+			queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
+			continue;
+		}
+
+		/* process received frame */
+#ifdef __ARMEB__
+		temp = skb;
+		skb = port->rx_buff_tab[n];
+		dma_unmap_single(&dev->dev, desc->data,
+				 RX_SIZE, DMA_FROM_DEVICE);
+#else
+		dma_sync_single(&dev->dev, desc->data,
+				RX_SIZE, DMA_FROM_DEVICE);
+		memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
+			      ALIGN(desc->pkt_len, 4) / 4);
+#endif
+		skb_put(skb, desc->pkt_len);
+
+		debug_pkt(dev, "hss_hdlc_poll", skb->data, skb->len);
+
+		skb->protocol = hdlc_type_trans(skb, dev);
+		dev->stats.rx_packets++;
+		dev->stats.rx_bytes += skb->len;
+		netif_receive_skb(skb);
+
+		/* put the new buffer on RX-free queue */
+#ifdef __ARMEB__
+		port->rx_buff_tab[n] = temp;
+		desc->data = phys;
+#endif
+		desc->buf_len = RX_SIZE;
+		desc->pkt_len = 0;
+		queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
+		received++;
+	}
+#if DEBUG_RX
+	printk(KERN_DEBUG "hss_hdlc_poll: end, not all work done\n");
+#endif
+	return received;	/* not all work done */
+}
+
+
+static void hss_hdlc_txdone_irq(void *pdev)
+{
+	struct net_device *dev = pdev;
+	struct port *port = dev_to_port(dev);
+	int n_desc;
+
+#if DEBUG_TX
+	printk(KERN_DEBUG DRV_NAME ": hss_hdlc_txdone_irq\n");
+#endif
+	while ((n_desc = queue_get_desc(queue_ids[port->id].txdone,
+					port, 1)) >= 0) {
+		struct desc *desc;
+		int start;
+
+		desc = tx_desc_ptr(port, n_desc);
+
+		dev->stats.tx_packets++;
+		dev->stats.tx_bytes += desc->pkt_len;
+
+		dma_unmap_tx(port, desc);
+#if DEBUG_TX
+		printk(KERN_DEBUG "%s: hss_hdlc_txdone_irq free %p\n",
+		       dev->name, port->tx_buff_tab[n_desc]);
+#endif
+		free_buffer_irq(port->tx_buff_tab[n_desc]);
+		port->tx_buff_tab[n_desc] = NULL;
+
+		start = qmgr_stat_empty(port->plat->txreadyq);
+		queue_put_desc(port->plat->txreadyq,
+			       tx_desc_phys(port, n_desc), desc);
+		if (start) {
+#if DEBUG_TX
+			printk(KERN_DEBUG "%s: hss_hdlc_txdone_irq xmit"
+			       " ready\n", dev->name);
+#endif
+			netif_wake_queue(dev);
+		}
+	}
+}
+
+static int hss_hdlc_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct port *port = dev_to_port(dev);
+	unsigned int txreadyq = port->plat->txreadyq;
+	int len, offset, bytes, n;
+	void *mem;
+	u32 phys;
+	struct desc *desc;
+
+#if DEBUG_TX
+	printk(KERN_DEBUG "%s: hss_hdlc_xmit\n", dev->name);
+#endif
+
+	if (unlikely(skb->len > HDLC_MAX_MRU)) {
+		dev_kfree_skb(skb);
+		dev->stats.tx_errors++;
+		return NETDEV_TX_OK;
+	}
+
+	debug_pkt(dev, "hss_hdlc_xmit", skb->data, skb->len);
+
+	len = skb->len;
+#ifdef __ARMEB__
+	offset = 0; /* no need to keep alignment */
+	bytes = len;
+	mem = skb->data;
+#else
+	offset = (int)skb->data & 3; /* keep 32-bit alignment */
+	bytes = ALIGN(offset + len, 4);
+	if (!(mem = kmalloc(bytes, GFP_ATOMIC))) {
+		dev_kfree_skb(skb);
+		dev->stats.tx_dropped++;
+		return NETDEV_TX_OK;
+	}
+	memcpy_swab32(mem, (u32 *)((int)skb->data & ~3), bytes / 4);
+	dev_kfree_skb(skb);
+#endif
+
+	phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
+	if (dma_mapping_error(&dev->dev, phys)) {
+#ifdef __ARMEB__
+		dev_kfree_skb(skb);
+#else
+		kfree(mem);
+#endif
+		dev->stats.tx_dropped++;
+		return NETDEV_TX_OK;
+	}
+
+	n = queue_get_desc(txreadyq, port, 1);
+	BUG_ON(n < 0);
+	desc = tx_desc_ptr(port, n);
+
+#ifdef __ARMEB__
+	port->tx_buff_tab[n] = skb;
+#else
+	port->tx_buff_tab[n] = mem;
+#endif
+	desc->data = phys + offset;
+	desc->buf_len = desc->pkt_len = len;
+
+	wmb();
+	queue_put_desc(queue_ids[port->id].tx, tx_desc_phys(port, n), desc);
+	dev->trans_start = jiffies;
+
+	if (qmgr_stat_empty(txreadyq)) {
+#if DEBUG_TX
+		printk(KERN_DEBUG "%s: hss_hdlc_xmit queue full\n", dev->name);
+#endif
+		netif_stop_queue(dev);
+		/* we could miss TX ready interrupt */
+		if (!qmgr_stat_empty(txreadyq)) {
+#if DEBUG_TX
+			printk(KERN_DEBUG "%s: hss_hdlc_xmit ready again\n",
+			       dev->name);
+#endif
+			netif_wake_queue(dev);
+		}
+	}
+
+#if DEBUG_TX
+	printk(KERN_DEBUG "%s: hss_hdlc_xmit end\n", dev->name);
+#endif
+	return NETDEV_TX_OK;
+}
+
+
+static int request_hdlc_queues(struct port *port)
+{
+	int err;
+
+	err = qmgr_request_queue(queue_ids[port->id].rxfree, RX_DESCS, 0, 0,
+				 "%s:RX-free", port->netdev->name);
+	if (err)
+		return err;
+
+	err = qmgr_request_queue(queue_ids[port->id].rx, RX_DESCS, 0, 0,
+				 "%s:RX", port->netdev->name);
+	if (err)
+		goto rel_rxfree;
+
+	err = qmgr_request_queue(queue_ids[port->id].tx, TX_DESCS, 0, 0,
+				 "%s:TX", port->netdev->name);
+	if (err)
+		goto rel_rx;
+
+	err = qmgr_request_queue(port->plat->txreadyq, TX_DESCS, 0, 0,
+				 "%s:TX-ready", port->netdev->name);
+	if (err)
+		goto rel_tx;
+
+	err = qmgr_request_queue(queue_ids[port->id].txdone, TX_DESCS, 0, 0,
+				 "%s:TX-done", port->netdev->name);
+	if (err)
+		goto rel_txready;
+	return 0;
+
+rel_txready:
+	qmgr_release_queue(port->plat->txreadyq);
+rel_tx:
+	qmgr_release_queue(queue_ids[port->id].tx);
+rel_rx:
+	qmgr_release_queue(queue_ids[port->id].rx);
+rel_rxfree:
+	qmgr_release_queue(queue_ids[port->id].rxfree);
+	printk(KERN_DEBUG "%s: unable to request hardware queues\n",
+	       port->netdev->name);
+	return err;
+}
+
+static void release_hdlc_queues(struct port *port)
+{
+	qmgr_release_queue(queue_ids[port->id].rxfree);
+	qmgr_release_queue(queue_ids[port->id].rx);
+	qmgr_release_queue(queue_ids[port->id].txdone);
+	qmgr_release_queue(queue_ids[port->id].tx);
+	qmgr_release_queue(port->plat->txreadyq);
+}
+
+static int init_hdlc_queues(struct port *port)
+{
+	int i;
+
+	if (!ports_open)
+		if (!(dma_pool = dma_pool_create(DRV_NAME, NULL,
+						 POOL_ALLOC_SIZE, 32, 0)))
+			return -ENOMEM;
+
+	if (!(port->desc_tab = dma_pool_alloc(dma_pool, GFP_KERNEL,
+					      &port->desc_tab_phys)))
+		return -ENOMEM;
+	memset(port->desc_tab, 0, POOL_ALLOC_SIZE);
+	memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */
+	memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
+
+	/* Setup RX buffers */
+	for (i = 0; i < RX_DESCS; i++) {
+		struct desc *desc = rx_desc_ptr(port, i);
+		buffer_t *buff;
+		void *data;
+#ifdef __ARMEB__
+		if (!(buff = netdev_alloc_skb(port->netdev, RX_SIZE)))
+			return -ENOMEM;
+		data = buff->data;
+#else
+		if (!(buff = kmalloc(RX_SIZE, GFP_KERNEL)))
+			return -ENOMEM;
+		data = buff;
+#endif
+		desc->buf_len = RX_SIZE;
+		desc->data = dma_map_single(&port->netdev->dev, data,
+					    RX_SIZE, DMA_FROM_DEVICE);
+		if (dma_mapping_error(&port->netdev->dev, desc->data)) {
+			free_buffer(buff);
+			return -EIO;
+		}
+		port->rx_buff_tab[i] = buff;
+	}
+
+	return 0;
+}
+
+static void destroy_hdlc_queues(struct port *port)
+{
+	int i;
+
+	if (port->desc_tab) {
+		for (i = 0; i < RX_DESCS; i++) {
+			struct desc *desc = rx_desc_ptr(port, i);
+			buffer_t *buff = port->rx_buff_tab[i];
+			if (buff) {
+				dma_unmap_single(&port->netdev->dev,
+						 desc->data, RX_SIZE,
+						 DMA_FROM_DEVICE);
+				free_buffer(buff);
+			}
+		}
+		for (i = 0; i < TX_DESCS; i++) {
+			struct desc *desc = tx_desc_ptr(port, i);
+			buffer_t *buff = port->tx_buff_tab[i];
+			if (buff) {
+				dma_unmap_tx(port, desc);
+				free_buffer(buff);
+			}
+		}
+		dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
+		port->desc_tab = NULL;
+	}
+
+	if (!ports_open && dma_pool) {
+		dma_pool_destroy(dma_pool);
+		dma_pool = NULL;
+	}
+}
+
+static int hss_hdlc_open(struct net_device *dev)
+{
+	struct port *port = dev_to_port(dev);
+	unsigned long flags;
+	int i, err = 0;
+
+	if ((err = hdlc_open(dev)))
+		return err;
+
+	if ((err = hss_load_firmware(port)))
+		goto err_hdlc_close;
+
+	if ((err = request_hdlc_queues(port)))
+		goto err_hdlc_close;
+
+	if ((err = init_hdlc_queues(port)))
+		goto err_destroy_queues;
+
+	spin_lock_irqsave(&npe_lock, flags);
+	if (port->plat->open)
+		if ((err = port->plat->open(port->id, dev,
+					    hss_hdlc_set_carrier)))
+			goto err_unlock;
+	spin_unlock_irqrestore(&npe_lock, flags);
+
+	/* Populate queues with buffers, no failure after this point */
+	for (i = 0; i < TX_DESCS; i++)
+		queue_put_desc(port->plat->txreadyq,
+			       tx_desc_phys(port, i), tx_desc_ptr(port, i));
+
+	for (i = 0; i < RX_DESCS; i++)
+		queue_put_desc(queue_ids[port->id].rxfree,
+			       rx_desc_phys(port, i), rx_desc_ptr(port, i));
+
+	napi_enable(&port->napi);
+	netif_start_queue(dev);
+
+	qmgr_set_irq(queue_ids[port->id].rx, QUEUE_IRQ_SRC_NOT_EMPTY,
+		     hss_hdlc_rx_irq, dev);
+
+	qmgr_set_irq(queue_ids[port->id].txdone, QUEUE_IRQ_SRC_NOT_EMPTY,
+		     hss_hdlc_txdone_irq, dev);
+	qmgr_enable_irq(queue_ids[port->id].txdone);
+
+	ports_open++;
+
+	hss_set_hdlc_cfg(port);
+	hss_config(port);
+
+	hss_start_hdlc(port);
+
+	/* we may already have RX data, enables IRQ */
+	netif_rx_schedule(dev, &port->napi);
+	return 0;
+
+err_unlock:
+	spin_unlock_irqrestore(&npe_lock, flags);
+err_destroy_queues:
+	destroy_hdlc_queues(port);
+	release_hdlc_queues(port);
+err_hdlc_close:
+	hdlc_close(dev);
+	return err;
+}
+
+static int hss_hdlc_close(struct net_device *dev)
+{
+	struct port *port = dev_to_port(dev);
+	unsigned long flags;
+	int i, buffs = RX_DESCS; /* allocated RX buffers */
+
+	spin_lock_irqsave(&npe_lock, flags);
+	ports_open--;
+	qmgr_disable_irq(queue_ids[port->id].rx);
+	netif_stop_queue(dev);
+	napi_disable(&port->napi);
+
+	hss_stop_hdlc(port);
+
+	while (queue_get_desc(queue_ids[port->id].rxfree, port, 0) >= 0)
+		buffs--;
+	while (queue_get_desc(queue_ids[port->id].rx, port, 0) >= 0)
+		buffs--;
+
+	if (buffs)
+		printk(KERN_CRIT "%s: unable to drain RX queue, %i buffer(s)"
+		       " left in NPE\n", dev->name, buffs);
+
+	buffs = TX_DESCS;
+	while (queue_get_desc(queue_ids[port->id].tx, port, 1) >= 0)
+		buffs--; /* cancel TX */
+
+	i = 0;
+	do {
+		while (queue_get_desc(port->plat->txreadyq, port, 1) >= 0)
+			buffs--;
+		if (!buffs)
+			break;
+	} while (++i < MAX_CLOSE_WAIT);
+
+	if (buffs)
+		printk(KERN_CRIT "%s: unable to drain TX queue, %i buffer(s) "
+		       "left in NPE\n", dev->name, buffs);
+#if DEBUG_CLOSE
+	if (!buffs)
+		printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i);
+#endif
+	qmgr_disable_irq(queue_ids[port->id].txdone);
+
+	if (port->plat->close)
+		port->plat->close(port->id, dev);
+	spin_unlock_irqrestore(&npe_lock, flags);
+
+	destroy_hdlc_queues(port);
+	release_hdlc_queues(port);
+	hdlc_close(dev);
+	return 0;
+}
+
+
+static int hss_hdlc_attach(struct net_device *dev, unsigned short encoding,
+			   unsigned short parity)
+{
+	struct port *port = dev_to_port(dev);
+
+	if (encoding != ENCODING_NRZ)
+		return -EINVAL;
+
+	switch(parity) {
+	case PARITY_CRC16_PR1_CCITT:
+		port->hdlc_cfg = 0;
+		return 0;
+
+	case PARITY_CRC32_PR1_CCITT:
+		port->hdlc_cfg = PKT_HDLC_CRC_32;
+		return 0;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+
+static int hss_hdlc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+	const size_t size = sizeof(sync_serial_settings);
+	sync_serial_settings new_line;
+	sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
+	struct port *port = dev_to_port(dev);
+	unsigned long flags;
+	int clk;
+
+	if (cmd != SIOCWANDEV)
+		return hdlc_ioctl(dev, ifr, cmd);
+
+	switch(ifr->ifr_settings.type) {
+	case IF_GET_IFACE:
+		ifr->ifr_settings.type = IF_IFACE_V35;
+		if (ifr->ifr_settings.size < size) {
+			ifr->ifr_settings.size = size; /* data size wanted */
+			return -ENOBUFS;
+		}
+		memset(&new_line, 0, sizeof(new_line));
+		new_line.clock_type = port->clock_type;
+		new_line.clock_rate = 2048000; /* FIXME */
+		new_line.loopback = port->loopback;
+		if (copy_to_user(line, &new_line, size))
+			return -EFAULT;
+		return 0;
+
+	case IF_IFACE_SYNC_SERIAL:
+	case IF_IFACE_V35:
+		if(!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		if (copy_from_user(&new_line, line, size))
+			return -EFAULT;
+
+		clk = new_line.clock_type;
+		if (port->plat->set_clock)
+			clk = port->plat->set_clock(port->id, clk);
+
+		if (clk != CLOCK_EXT && clk != CLOCK_INT)
+			return -EINVAL;	/* No such clock setting */
+
+		if (new_line.loopback != 0 && new_line.loopback != 1)
+			return -EINVAL;
+
+		port->clock_type = clk; /* Update settings */
+		/* FIXME port->clock_rate = new_line.clock_rate */;
+		port->loopback = new_line.loopback;
+
+		spin_lock_irqsave(&npe_lock, flags);
+
+		if (dev->flags & IFF_UP)
+			hss_config(port);
+
+		if (port->loopback || port->carrier)
+			netif_carrier_on(port->netdev);
+		else
+			netif_carrier_off(port->netdev);
+		spin_unlock_irqrestore(&npe_lock, flags);
+
+		return 0;
+
+	default:
+		return hdlc_ioctl(dev, ifr, cmd);
+	}
+}
+
+/*****************************************************************************
+ * initialization
+ ****************************************************************************/
+
+static int __devinit hss_init_one(struct platform_device *pdev)
+{
+	struct port *port;
+	struct net_device *dev;
+	hdlc_device *hdlc;
+	int err;
+
+	if ((port = kzalloc(sizeof(*port), GFP_KERNEL)) == NULL)
+		return -ENOMEM;
+
+	if ((port->npe = npe_request(0)) == NULL) {
+		err = -ENOSYS;
+		goto err_free;
+	}
+
+	if ((port->netdev = dev = alloc_hdlcdev(port)) == NULL) {
+		err = -ENOMEM;
+		goto err_plat;
+	}
+
+	SET_NETDEV_DEV(dev, &pdev->dev);
+	hdlc = dev_to_hdlc(dev);
+	hdlc->attach = hss_hdlc_attach;
+	hdlc->xmit = hss_hdlc_xmit;
+	dev->open = hss_hdlc_open;
+	dev->stop = hss_hdlc_close;
+	dev->do_ioctl = hss_hdlc_ioctl;
+	dev->tx_queue_len = 100;
+	port->clock_type = CLOCK_EXT;
+	port->clock_rate = 2048000;
+	port->id = pdev->id;
+	port->dev = &pdev->dev;
+	port->plat = pdev->dev.platform_data;
+	netif_napi_add(dev, &port->napi, hss_hdlc_poll, NAPI_WEIGHT);
+
+	if ((err = register_hdlc_device(dev)))
+		goto err_free_netdev;
+
+	platform_set_drvdata(pdev, port);
+
+	printk(KERN_INFO "%s: HSS-%i\n", dev->name, port->id);
+	return 0;
+
+err_free_netdev:
+	free_netdev(dev);
+err_plat:
+	npe_release(port->npe);
+err_free:
+	kfree(port);
+	return err;
+}
+
+static int __devexit hss_remove_one(struct platform_device *pdev)
+{
+	struct port *port = platform_get_drvdata(pdev);
+
+	unregister_hdlc_device(port->netdev);
+	free_netdev(port->netdev);
+	npe_release(port->npe);
+	platform_set_drvdata(pdev, NULL);
+	kfree(port);
+	return 0;
+}
+
+static struct platform_driver ixp4xx_hss_driver = {
+	.driver.name	= DRV_NAME,
+	.probe		= hss_init_one,
+	.remove		= hss_remove_one,
+};
+
+static int __init hss_init_module(void)
+{
+	if ((ixp4xx_read_feature_bits() &
+	     (IXP4XX_FEATURE_HDLC | IXP4XX_FEATURE_HSS)) !=
+	    (IXP4XX_FEATURE_HDLC | IXP4XX_FEATURE_HSS))
+		return -ENOSYS;
+
+	spin_lock_init(&npe_lock);
+
+	return platform_driver_register(&ixp4xx_hss_driver);
+}
+
+static void __exit hss_cleanup_module(void)
+{
+	platform_driver_unregister(&ixp4xx_hss_driver);
+}
+
+MODULE_AUTHOR("Krzysztof Halasa");
+MODULE_DESCRIPTION("Intel IXP4xx HSS driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:ixp4xx_hss");
+module_init(hss_init_module);
+module_exit(hss_cleanup_module);