path: root/target/linux/lantiq/patches/230-xway_etop.patch

--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -358,6 +358,12 @@
 
 source "drivers/net/arm/Kconfig"
 
+config LANTIQ_ETOP
+	tristate "Lantiq SoC ETOP driver"
+	depends on SOC_LANTIQ_XWAY
+	help
+	  Support for the MII0 inside the Lantiq SoC
+
 config AX88796
 	tristate "ASIX AX88796 NE2000 clone support"
 	depends on ARM || MIPS || SUPERH
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -213,6 +213,7 @@
 obj-$(CONFIG_MVME16x_NET) += 82596.o
 obj-$(CONFIG_BVME6000_NET) += 82596.o
 obj-$(CONFIG_SC92031) += sc92031.o
+obj-$(CONFIG_LANTIQ_ETOP) += lantiq_etop.o
 
 # This is also a 82596 and should probably be merged
 obj-$(CONFIG_LP486E) += lp486e.o
--- /dev/null
+++ b/drivers/net/lantiq_etop.c
@@ -0,0 +1,552 @@
+/*
+ *   This program is free software; you can redistribute it and/or modify it
+ *   under the terms of the GNU General Public License version 2 as published
+ *   by the Free Software Foundation.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ *   Copyright (C) 2005 Wu Qi Ming <Qi-Ming.Wu@infineon.com>
+ *   Copyright (C) 2008 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/uaccess.h>
+#include <linux/in.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/phy.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/skbuff.h>
+#include <linux/mm.h>
+#include <linux/platform_device.h>
+#include <linux/ethtool.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include <asm/checksum.h>
+
+#include <xway.h>
+#include <xway_dma.h>
+#include <lantiq_platform.h>
+
+#define ETHERNET_PACKET_DMA_BUFFER_SIZE		0x600
+#define LQ_PPE32_MEM_MAP		((u32 *)(LQ_PPE32_BASE_ADDR + 0x10000))
+#define LQ_PPE32_SRST		((u32 *)(LQ_PPE32_BASE_ADDR + 0x10080))
+
+/* mdio access */
+#define LQ_PPE32_MDIO_CFG		((u32 *)(LQ_PPE32_BASE_ADDR + 0x11800))
+#define LQ_PPE32_MDIO_ACC		((u32 *)(LQ_PPE32_BASE_ADDR + 0x11804))
+
+#define MDIO_ACC_REQUEST		0x80000000
+#define MDIO_ACC_READ			0x40000000
+#define MDIO_ACC_ADDR_MASK		0x1f
+#define MDIO_ACC_ADDR_OFFSET		0x15
+#define MDIO_ACC_REG_MASK		0x1f
+#define MDIO_ACC_REG_OFFSET		0x10
+#define MDIO_ACC_VAL_MASK		0xffff
+
+/* configuration */
+#define LQ_PPE32_CFG		((u32 *)(LQ_PPE32_MEM_MAP + 0x1808))
+
+#define PPE32_MII_MASK			0xfffffffc
+#define PPE32_MII_NORMAL		0x8
+#define PPE32_MII_REVERSE		0xe
+
+/* packet length */
+#define LQ_PPE32_IG_PLEN_CTRL	((u32 *)(LQ_PPE32_MEM_MAP + 0x1820))
+
+#define PPE32_PLEN_OVER			0x5ee
+#define PPE32_PLEN_UNDER		0x400000
+
+/* enet */
+#define LQ_PPE32_ENET_MAC_CFG	((u32 *)(LQ_PPE32_MEM_MAP + 0x1840))
+
+#define PPE32_CGEN			0x800
+
+struct lq_mii_priv {
+	struct net_device_stats stats;
+	struct dma_device_info *dma_device;
+	struct sk_buff *skb;
+
+	struct mii_bus *mii_bus;
+	struct phy_device *phydev;
+	int oldlink, oldspeed, oldduplex;
+};
+
+static struct net_device *lq_etop_dev;
+static unsigned char mac_addr[MAX_ADDR_LEN];
+
+static int lq_mdiobus_write(struct mii_bus *bus, int phy_addr,
+				int phy_reg, u16 phy_data)
+{
+	u32 val = MDIO_ACC_REQUEST |
+		((phy_addr & MDIO_ACC_ADDR_MASK) << MDIO_ACC_ADDR_OFFSET) |
+		((phy_reg & MDIO_ACC_REG_MASK) << MDIO_ACC_REG_OFFSET) |
+		phy_data;
+
+	while (lq_r32(LQ_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
+		;
+	lq_w32(val, LQ_PPE32_MDIO_ACC);
+
+	return 0;
+}
+
+static int lq_mdiobus_read(struct mii_bus *bus, int phy_addr, int phy_reg)
+{
+	u32 val = MDIO_ACC_REQUEST | MDIO_ACC_READ |
+		((phy_addr & MDIO_ACC_ADDR_MASK) << MDIO_ACC_ADDR_OFFSET) |
+		((phy_reg & MDIO_ACC_REG_MASK) << MDIO_ACC_REG_OFFSET);
+
+	while (lq_r32(LQ_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
+		;
+	lq_w32(val, LQ_PPE32_MDIO_ACC);
+	while (lq_r32(LQ_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
+		;
+	val = lq_r32(LQ_PPE32_MDIO_ACC) & MDIO_ACC_VAL_MASK;
+	return val;
+}
+
+int lq_mii_open(struct net_device *dev)
+{
+	struct lq_mii_priv *priv = (struct lq_mii_priv *)netdev_priv(dev);
+	struct dma_device_info *dma_dev = priv->dma_device;
+	int i;
+
+	for (i = 0; i < dma_dev->max_rx_chan_num; i++) {
+		if ((dma_dev->rx_chan[i])->control == LQ_DMA_CH_ON)
+			(dma_dev->rx_chan[i])->open(dma_dev->rx_chan[i]);
+	}
+	netif_start_queue(dev);
+	return 0;
+}
+
+int lq_mii_release(struct net_device *dev)
+{
+	struct lq_mii_priv *priv = (struct lq_mii_priv *)netdev_priv(dev);
+	struct dma_device_info *dma_dev = priv->dma_device;
+	int i;
+
+	for (i = 0; i < dma_dev->max_rx_chan_num; i++)
+		dma_dev->rx_chan[i]->close(dma_dev->rx_chan[i]);
+	netif_stop_queue(dev);
+	return 0;
+}
+
+int lq_mii_hw_receive(struct net_device *dev, struct dma_device_info *dma_dev)
+{
+	struct lq_mii_priv *priv = (struct lq_mii_priv *)netdev_priv(dev);
+	unsigned char *buf = NULL;
+	struct sk_buff *skb = NULL;
+	int len = 0;
+
+	len = dma_device_read(dma_dev, &buf, (void **)&skb);
+
+	if (len >= ETHERNET_PACKET_DMA_BUFFER_SIZE) {
+		printk(KERN_INFO "lq_etop: packet too large %d\n", len);
+		goto lq_mii_hw_receive_err_exit;
+	}
+
+	/* remove CRC */
+	len -= 4;
+	if (skb == NULL) {
+		printk(KERN_INFO "lq_etop: cannot restore pointer\n");
+		goto lq_mii_hw_receive_err_exit;
+	}
+
+	if (len > (skb->end - skb->tail)) {
+		printk(KERN_INFO "lq_etop: BUG, len:%d end:%p tail:%p\n",
+			(len+4), skb->end, skb->tail);
+		goto lq_mii_hw_receive_err_exit;
+	}
+
+	skb_put(skb, len);
+	skb->dev = dev;
+	skb->protocol = eth_type_trans(skb, dev);
+	netif_rx(skb);
+
+	priv->stats.rx_packets++;
+	priv->stats.rx_bytes += len;
+	return 0;
+
+lq_mii_hw_receive_err_exit:
+	if (len == 0) {
+		if (skb)
+			dev_kfree_skb_any(skb);
+		priv->stats.rx_errors++;
+		priv->stats.rx_dropped++;
+		return -EIO;
+	} else {
+		return len;
+	}
+}
+
+int lq_mii_hw_tx(char *buf, int len, struct net_device *dev)
+{
+	int ret = 0;
+	struct lq_mii_priv *priv = netdev_priv(dev);
+	struct dma_device_info *dma_dev = priv->dma_device;
+	ret = dma_device_write(dma_dev, buf, len, priv->skb);
+	return ret;
+}
+
+int lq_mii_tx(struct sk_buff *skb, struct net_device *dev)
+{
+	int len;
+	char *data;
+	struct lq_mii_priv *priv = netdev_priv(dev);
+	struct dma_device_info *dma_dev = priv->dma_device;
+
+	len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
+	data = skb->data;
+	priv->skb = skb;
+	dev->trans_start = jiffies;
+	/* TODO: we got more than 1 dma channel,
+	   so we should do something intelligent here to select one */
+	dma_dev->current_tx_chan = 0;
+
+	wmb();
+
+	if (lq_mii_hw_tx(data, len, dev) != len) {
+		dev_kfree_skb_any(skb);
+		priv->stats.tx_errors++;
+		priv->stats.tx_dropped++;
+	} else {
+		priv->stats.tx_packets++;
+		priv->stats.tx_bytes += len;
+	}
+
+	return 0;
+}
+
+void lq_mii_tx_timeout(struct net_device *dev)
+{
+	int i;
+	struct lq_mii_priv *priv = (struct lq_mii_priv *)netdev_priv(dev);
+
+	priv->stats.tx_errors++;
+	for (i = 0; i < priv->dma_device->max_tx_chan_num; i++)
+		priv->dma_device->tx_chan[i]->disable_irq(priv->dma_device->tx_chan[i]);
+	netif_wake_queue(dev);
+	return;
+}
+
+int dma_intr_handler(struct dma_device_info *dma_dev, int status)
+{
+	int i;
+
+	switch (status) {
+	case RCV_INT:
+		lq_mii_hw_receive(lq_etop_dev, dma_dev);
+		break;
+
+	case TX_BUF_FULL_INT:
+		printk(KERN_INFO "lq_etop: tx buffer full\n");
+		netif_stop_queue(lq_etop_dev);
+		for (i = 0; i < dma_dev->max_tx_chan_num; i++) {
+			if ((dma_dev->tx_chan[i])->control == LQ_DMA_CH_ON)
+				dma_dev->tx_chan[i]->enable_irq(dma_dev->tx_chan[i]);
+		}
+		break;
+
+	case TRANSMIT_CPT_INT:
+		for (i = 0; i < dma_dev->max_tx_chan_num; i++)
+			dma_dev->tx_chan[i]->disable_irq(dma_dev->tx_chan[i]);
+
+		netif_wake_queue(lq_etop_dev);
+		break;
+	}
+
+	return 0;
+}
+
+unsigned char *lq_etop_dma_buffer_alloc(int len, int *byte_offset, void **opt)
+{
+	unsigned char *buffer = NULL;
+	struct sk_buff *skb = NULL;
+
+	skb = dev_alloc_skb(ETHERNET_PACKET_DMA_BUFFER_SIZE);
+	if (skb == NULL)
+		return NULL;
+
+	buffer = (unsigned char *)(skb->data);
+	skb_reserve(skb, 2);
+	*(int *)opt = (int)skb;
+	*byte_offset = 2;
+
+	return buffer;
+}
+
+void lq_etop_dma_buffer_free(unsigned char *dataptr, void *opt)
+{
+	struct sk_buff *skb = NULL;
+
+	if (opt == NULL) {
+		kfree(dataptr);
+	} else {
+		skb = (struct sk_buff *)opt;
+		dev_kfree_skb_any(skb);
+	}
+}
+
+static void
+lq_adjust_link(struct net_device *dev)
+{
+	struct lq_mii_priv *priv = netdev_priv(dev);
+	struct phy_device *phydev = priv->phydev;
+	int new_state = 0;
+
+	/* Did anything change? */
+	if (priv->oldlink != phydev->link ||
+		priv->oldduplex != phydev->duplex ||
+		priv->oldspeed != phydev->speed) {
+		/* Yes, so update status and mark as changed */
+		new_state = 1;
+		priv->oldduplex = phydev->duplex;
+		priv->oldspeed = phydev->speed;
+		priv->oldlink = phydev->link;
+	}
+
+	/* If link status changed, show new status */
+	if (new_state)
+		phy_print_status(phydev);
+}
+
+static int mii_probe(struct net_device *dev)
+{
+	struct lq_mii_priv *priv = netdev_priv(dev);
+	struct phy_device *phydev = NULL;
+	int phy_addr;
+
+	priv->oldlink = 0;
+	priv->oldspeed = 0;
+	priv->oldduplex = -1;
+
+	/* find the first (lowest address) PHY on the current MAC's MII bus */
+	for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
+		if (priv->mii_bus->phy_map[phy_addr]) {
+			phydev = priv->mii_bus->phy_map[phy_addr];
+			break; /* break out with first one found */
+		}
+	}
+
+	if (!phydev) {
+		printk (KERN_ERR "%s: no PHY found\n", dev->name);
+		return -ENODEV;
+	}
+
+	/* now we are supposed to have a proper phydev, to attach to... */
+	BUG_ON(!phydev);
+	BUG_ON(phydev->attached_dev);
+
+	phydev = phy_connect(dev, dev_name(&phydev->dev), &lq_adjust_link,
+			0, PHY_INTERFACE_MODE_MII);
+
+	if (IS_ERR(phydev)) {
+		printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
+		return PTR_ERR(phydev);
+	}
+
+	/* mask with MAC supported features */
+	phydev->supported &= (SUPPORTED_10baseT_Half
+			      | SUPPORTED_10baseT_Full
+			      | SUPPORTED_100baseT_Half
+			      | SUPPORTED_100baseT_Full
+			      | SUPPORTED_Autoneg
+			      /* | SUPPORTED_Pause | SUPPORTED_Asym_Pause */
+			      | SUPPORTED_MII
+			      | SUPPORTED_TP);
+
+	phydev->advertising = phydev->supported;
+
+	priv->phydev = phydev;
+
+	printk(KERN_INFO "%s: attached PHY driver [%s] "
+	       "(mii_bus:phy_addr=%s, irq=%d)\n",
+	       dev->name, phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
+
+	return 0;
+}
+
+
+static int lq_mii_dev_init(struct net_device *dev)
+{
+	int i;
+	struct lq_mii_priv *priv = (struct lq_mii_priv *)netdev_priv(dev);
+	ether_setup(dev);
+	dev->watchdog_timeo = 10 * HZ;
+	dev->mtu = 1500;
+	memset(priv, 0, sizeof(struct lq_mii_priv));
+	priv->dma_device = dma_device_reserve("PPE");
+	if (!priv->dma_device) {
+		BUG();
+		return -ENODEV;
+	}
+	priv->dma_device->buffer_alloc = &lq_etop_dma_buffer_alloc;
+	priv->dma_device->buffer_free = &lq_etop_dma_buffer_free;
+	priv->dma_device->intr_handler = &dma_intr_handler;
+	priv->dma_device->max_rx_chan_num = 4;
+
+	for (i = 0; i < priv->dma_device->max_rx_chan_num; i++) {
+		priv->dma_device->rx_chan[i]->packet_size = ETHERNET_PACKET_DMA_BUFFER_SIZE;
+		priv->dma_device->rx_chan[i]->control = LQ_DMA_CH_ON;
+	}
+
+	for (i = 0; i < priv->dma_device->max_tx_chan_num; i++)
+		if (i == 0)
+			priv->dma_device->tx_chan[i]->control = LQ_DMA_CH_ON;
+		else
+			priv->dma_device->tx_chan[i]->control = LQ_DMA_CH_OFF;
+
+	dma_device_register(priv->dma_device);
+
+	printk(KERN_INFO "%s: using mac=", dev->name);
+	for (i = 0; i < 6; i++) {
+		dev->dev_addr[i] = mac_addr[i];
+		printk("%02X%c", dev->dev_addr[i], (i == 5) ? ('\n') : (':'));
+	}
+
+	priv->mii_bus = mdiobus_alloc();
+	if (priv->mii_bus == NULL)
+		return -ENOMEM;
+
+	priv->mii_bus->priv = dev;
+	priv->mii_bus->read = lq_mdiobus_read;
+	priv->mii_bus->write = lq_mdiobus_write;
+	priv->mii_bus->name = "lq_mii";
+	snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%x", 0);
+	priv->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
+	for(i = 0; i < PHY_MAX_ADDR; ++i)
+		priv->mii_bus->irq[i] = PHY_POLL;
+
+	mdiobus_register(priv->mii_bus);
+
+	return mii_probe(dev);
+}
+
+static void lq_mii_chip_init(int mode)
+{
+	lq_pmu_enable(PMU_DMA);
+	lq_pmu_enable(PMU_PPE);
+
+	if (mode == REV_MII_MODE)
+		lq_w32_mask(PPE32_MII_MASK, PPE32_MII_REVERSE, LQ_PPE32_CFG);
+	else if (mode == MII_MODE)
+		lq_w32_mask(PPE32_MII_MASK, PPE32_MII_NORMAL, LQ_PPE32_CFG);
+	lq_w32(PPE32_PLEN_UNDER | PPE32_PLEN_OVER, LQ_PPE32_IG_PLEN_CTRL);
+	lq_w32(PPE32_CGEN, LQ_PPE32_ENET_MAC_CFG);
+	wmb();
+}
+
+static int lq_mii_eth_mac_addr(struct net_device *dev, void *p)
+{
+	int retcode;
+
+	retcode = eth_mac_addr(dev, p);
+
+	if (retcode)
+		return retcode;
+
+	// set rx_addr for unicast filter
+	lq_w32(((dev->dev_addr[0]<<24)|(dev->dev_addr[1]<<16)|(dev->dev_addr[2]<< 8)|dev->dev_addr[3]), (u32*)(LQ_PPE32_BASE_ADDR|(0x461b<<2)));
+	lq_w32(((dev->dev_addr[4]<<24)|(dev->dev_addr[5]<<16)), (u32*)(LQ_PPE32_BASE_ADDR|(0x461c<<2)));
+
+	return 0;
+}
+
+static void lq_mii_set_rx_mode (struct net_device *dev)
+{
+	// rx_mode promisc: unset unicast filter
+	if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI))
+		lq_w32(lq_r32((u32*)(LQ_PPE32_BASE_ADDR|(0x4614<<2))) & ~(1<<28), (u32*)(LQ_PPE32_BASE_ADDR|(0x4614<<2)));
+	// enable unicast filter
+	else
+		lq_w32(lq_r32((u32*)(LQ_PPE32_BASE_ADDR|(0x4614<<2))) | (1<<28), (u32*)(LQ_PPE32_BASE_ADDR|(0x4614<<2)));
+}
+
+static const struct net_device_ops lq_eth_netdev_ops = {
+	.ndo_init				= lq_mii_dev_init,
+	.ndo_open				= lq_mii_open,
+	.ndo_stop				= lq_mii_release,
+	.ndo_start_xmit			= lq_mii_tx,
+	.ndo_tx_timeout			= lq_mii_tx_timeout,
+	.ndo_change_mtu			= eth_change_mtu,
+	.ndo_set_mac_address	= lq_mii_eth_mac_addr,
+	.ndo_validate_addr		= eth_validate_addr,
+	.ndo_set_multicast_list	= lq_mii_set_rx_mode,
+};
+
+static int
+lq_mii_probe(struct platform_device *dev)
+{
+	int result = 0;
+	struct lq_eth_data *eth = (struct lq_eth_data*)dev->dev.platform_data;
+	lq_etop_dev = alloc_etherdev(sizeof(struct lq_mii_priv));
+	lq_etop_dev->netdev_ops = &lq_eth_netdev_ops;
+	memcpy(mac_addr, eth->mac, 6);
+	strcpy(lq_etop_dev->name, "eth%d");
+	lq_mii_chip_init(eth->mii_mode);
+	result = register_netdev(lq_etop_dev);
+	if (result) {
+		printk(KERN_INFO "lq_etop: error %i registering device \"%s\"\n", result, lq_etop_dev->name);
+		goto out;
+	}
+
+	printk(KERN_INFO "lq_etop: driver loaded!\n");
+
+out:
+	return result;
+}
+
+static int lq_mii_remove(struct platform_device *dev)
+{
+	struct lq_mii_priv *priv = (struct lq_mii_priv *)netdev_priv(lq_etop_dev);
+
+	printk(KERN_INFO "lq_etop: lq_etop cleanup\n");
+
+	dma_device_unregister(priv->dma_device);
+	dma_device_release(priv->dma_device);
+	kfree(priv->dma_device);
+	unregister_netdev(lq_etop_dev);
+	return 0;
+}
+
+static struct platform_driver lq_mii_driver = {
+	.probe = lq_mii_probe,
+	.remove = lq_mii_remove,
+	.driver = {
+		.name = "lq_etop",
+		.owner = THIS_MODULE,
+	},
+};
+
+int __init lq_mii_init(void)
+{
+	int ret = platform_driver_register(&lq_mii_driver);
+	if (ret)
+		printk(KERN_INFO "lq_etop: Error registering platfom driver!");
+	return ret;
+}
+
+static void __exit lq_mii_cleanup(void)
+{
+	platform_driver_unregister(&lq_mii_driver);
+}
+
+module_init(lq_mii_init);
+module_exit(lq_mii_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
+MODULE_DESCRIPTION("ethernet driver for IFXMIPS boards");