openwrt-xburst/target/linux/ifxmips/patches-2.6.30/130-ethernet.patch

Index: linux-2.6.30.8/drivers/net/Kconfig
===================================================================
--- linux-2.6.30.8.orig/drivers/net/Kconfig	2009-10-19 21:31:30.000000000 +0200
+++ linux-2.6.30.8/drivers/net/Kconfig	2009-10-19 21:31:32.000000000 +0200
@@ -353,6 +353,12 @@
 
 source "drivers/net/arm/Kconfig"
 
+config IFXMIPS_MII0
+	tristate "Infineon IFXMips eth0 driver"
+	depends on IFXMIPS
+	help
+	  Support for the MII0 inside the IFXMips SOC
+
 config AX88796
 	tristate "ASIX AX88796 NE2000 clone support"
 	depends on ARM || MIPS || SUPERH
Index: linux-2.6.30.8/drivers/net/Makefile
===================================================================
--- linux-2.6.30.8.orig/drivers/net/Makefile	2009-10-19 21:31:30.000000000 +0200
+++ linux-2.6.30.8/drivers/net/Makefile	2009-10-19 21:31:32.000000000 +0200
@@ -234,6 +234,7 @@
 obj-$(CONFIG_MLX4_CORE) += mlx4/
 obj-$(CONFIG_ENC28J60) += enc28j60.o
 obj-$(CONFIG_ETHOC) += ethoc.o
+obj-$(CONFIG_IFXMIPS_MII0) += ifxmips_mii0.o
 
 obj-$(CONFIG_XTENSA_XT2000_SONIC) += xtsonic.o
 
Index: linux-2.6.30.8/drivers/net/ifxmips_mii0.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.30.8/drivers/net/ifxmips_mii0.c	2009-10-19 21:41:10.000000000 +0200
@@ -0,0 +1,389 @@
+/*
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   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/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 <ifxmips.h>
+#include <ifxmips_dma.h>
+#include <ifxmips_pmu.h>
+
+struct ifxmips_mii_priv {
+	struct net_device_stats stats;
+	struct dma_device_info *dma_device;
+	struct sk_buff *skb;
+};
+
+static struct net_device *ifxmips_mii0_dev;
+static unsigned char mac_addr[MAX_ADDR_LEN];
+
+void ifxmips_write_mdio(u32 phy_addr, u32 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 (ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
+		;
+	ifxmips_w32(val, IFXMIPS_PPE32_MDIO_ACC);
+}
+EXPORT_SYMBOL(ifxmips_write_mdio);
+
+unsigned short ifxmips_read_mdio(u32 phy_addr, u32 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 (ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
+		;
+	ifxmips_w32(val, IFXMIPS_PPE32_MDIO_ACC);
+	while (ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_REQUEST)
+		;
+	val = ifxmips_r32(IFXMIPS_PPE32_MDIO_ACC) & MDIO_ACC_VAL_MASK;
+	return val;
+}
+EXPORT_SYMBOL(ifxmips_read_mdio);
+
+int ifxmips_ifxmips_mii_open(struct net_device *dev)
+{
+	struct ifxmips_mii_priv *priv = (struct ifxmips_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 == IFXMIPS_DMA_CH_ON)
+			(dma_dev->rx_chan[i])->open(dma_dev->rx_chan[i]);
+	}
+	netif_start_queue(dev);
+	return 0;
+}
+
+int ifxmips_mii_release(struct net_device *dev)
+{
+	struct ifxmips_mii_priv *priv = (struct ifxmips_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 ifxmips_mii_hw_receive(struct net_device *dev, struct dma_device_info *dma_dev)
+{
+	struct ifxmips_mii_priv *priv = (struct ifxmips_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 "ifxmips_mii0: packet too large %d\n", len);
+		goto ifxmips_mii_hw_receive_err_exit;
+	}
+
+	/* remove CRC */
+	len -= 4;
+	if (skb == NULL) {
+		printk(KERN_INFO "ifxmips_mii0: cannot restore pointer\n");
+		goto ifxmips_mii_hw_receive_err_exit;
+	}
+
+	if (len > (skb->end - skb->tail)) {
+		printk(KERN_INFO "ifxmips_mii0: BUG, len:%d end:%p tail:%p\n",
+			(len+4), skb->end, skb->tail);
+		goto ifxmips_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;
+
+ifxmips_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 ifxmips_mii_hw_tx(char *buf, int len, struct net_device *dev)
+{
+	int ret = 0;
+	struct ifxmips_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 ifxmips_mii_tx(struct sk_buff *skb, struct net_device *dev)
+{
+	int len;
+	char *data;
+	struct ifxmips_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 (ifxmips_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 ifxmips_mii_tx_timeout(struct net_device *dev)
+{
+	int i;
+	struct ifxmips_mii_priv *priv = (struct ifxmips_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:
+		ifxmips_mii_hw_receive(ifxmips_mii0_dev, dma_dev);
+		break;
+
+	case TX_BUF_FULL_INT:
+		printk(KERN_INFO "ifxmips_mii0: tx buffer full\n");
+		netif_stop_queue(ifxmips_mii0_dev);
+		for (i = 0; i < dma_dev->max_tx_chan_num; i++) {
+			if ((dma_dev->tx_chan[i])->control == IFXMIPS_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(ifxmips_mii0_dev);
+		break;
+	}
+
+	return 0;
+}
+
+unsigned char *ifxmips_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 ifxmips_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 struct net_device_stats *ifxmips_get_stats(struct net_device *dev)
+{
+	return &((struct ifxmips_mii_priv *)netdev_priv(dev))->stats;
+}
+
+static int ifxmips_mii_dev_init(struct net_device *dev)
+{
+	int i;
+	struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(dev);
+	ether_setup(dev);
+	printk(KERN_INFO "ifxmips_mii0: %s is up\n", dev->name);
+	dev->open = ifxmips_ifxmips_mii_open;
+	dev->stop = ifxmips_mii_release;
+	dev->hard_start_xmit = ifxmips_mii_tx;
+	dev->get_stats = ifxmips_get_stats;
+	dev->tx_timeout = ifxmips_mii_tx_timeout;
+	dev->watchdog_timeo = 10 * HZ;
+	memset(priv, 0, sizeof(struct ifxmips_mii_priv));
+	priv->dma_device = dma_device_reserve("PPE");
+	if (!priv->dma_device) {
+		BUG();
+		return -ENODEV;
+	}
+	priv->dma_device->buffer_alloc = &ifxmips_etop_dma_buffer_alloc;
+	priv->dma_device->buffer_free = &ifxmips_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 = IFXMIPS_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 = IFXMIPS_DMA_CH_ON;
+		else
+			priv->dma_device->tx_chan[i]->control = IFXMIPS_DMA_CH_OFF;
+
+	dma_device_register(priv->dma_device);
+
+	printk(KERN_INFO "ifxmips_mii0: using mac=");
+	for (i = 0; i < 6; i++) {
+		dev->dev_addr[i] = mac_addr[i];
+		printk("%02X%c", dev->dev_addr[i], (i == 5) ? ('\n') : (':'));
+	}
+	return 0;
+}
+
+static void ifxmips_mii_chip_init(int mode)
+{
+	ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_DMA);
+	ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_PPE);
+
+	if (mode == REV_MII_MODE)
+		ifxmips_w32_mask(PPE32_MII_MASK, PPE32_MII_REVERSE, IFXMIPS_PPE32_CFG);
+	else if (mode == MII_MODE)
+		ifxmips_w32_mask(PPE32_MII_MASK, PPE32_MII_NORMAL, IFXMIPS_PPE32_CFG);
+	ifxmips_w32(PPE32_PLEN_UNDER | PPE32_PLEN_OVER, IFXMIPS_PPE32_IG_PLEN_CTRL);
+	ifxmips_w32(PPE32_CGEN, IFXMIPS_PPE32_ENET_MAC_CFG);
+	wmb();
+}
+
+static int ifxmips_mii_probe(struct platform_device *dev)
+{
+	int result = 0;
+	unsigned char *mac = (unsigned char *)dev->dev.platform_data;
+	ifxmips_mii0_dev = alloc_etherdev(sizeof(struct ifxmips_mii_priv));
+	ifxmips_mii0_dev->init = ifxmips_mii_dev_init;
+	memcpy(mac_addr, mac, 6);
+	strcpy(ifxmips_mii0_dev->name, "eth%d");
+	ifxmips_mii_chip_init(REV_MII_MODE);
+	result = register_netdev(ifxmips_mii0_dev);
+	if (result) {
+		printk(KERN_INFO "ifxmips_mii0: error %i registering device \"%s\"\n", result, ifxmips_mii0_dev->name);
+		goto out;
+	}
+
+	printk(KERN_INFO "ifxmips_mii0: driver loaded!\n");
+
+out:
+	return result;
+}
+
+static int ifxmips_mii_remove(struct platform_device *dev)
+{
+	struct ifxmips_mii_priv *priv = (struct ifxmips_mii_priv *)netdev_priv(ifxmips_mii0_dev);
+
+	printk(KERN_INFO "ifxmips_mii0: ifxmips_mii0 cleanup\n");
+
+	dma_device_unregister(priv->dma_device);
+	dma_device_release(priv->dma_device);
+	kfree(priv->dma_device);
+	unregister_netdev(ifxmips_mii0_dev);
+	return 0;
+}
+
+static struct platform_driver ifxmips_mii_driver = {
+	.probe = ifxmips_mii_probe,
+	.remove = ifxmips_mii_remove,
+	.driver = {
+		.name = "ifxmips_mii0",
+		.owner = THIS_MODULE,
+	},
+};
+
+int __init ifxmips_mii_init(void)
+{
+	int ret = platform_driver_register(&ifxmips_mii_driver);
+	if (ret)
+		printk(KERN_INFO "ifxmips_mii0: Error registering platfom driver!");
+	return ret;
+}
+
+static void __exit ifxmips_mii_cleanup(void)
+{
+	platform_driver_unregister(&ifxmips_mii_driver);
+}
+
+module_init(ifxmips_mii_init);
+module_exit(ifxmips_mii_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
+MODULE_DESCRIPTION("ethernet driver for IFXMIPS boards");
+